Chemical reaction in which heat is re- leased?

Chemical reaction in which heat is re-
leased?
by

1 Answer

Answer :

Exothermic reaction
by

Related questions

How to set the Leased Time on the ADSL Router to forever?

Description : How to set the Leased Time on the ADSL Router to forever?

Last Answer : answer:Well, we can’t really answer this question unles you tell us the manufacturer and model number of the router. However, I suspect that the answer is to set the lease time to 0 (zero).

Do I need to get my leased car serviced by an authorized service center?

Description : Do I need to get my leased car serviced by an authorized service center?

Last Answer : Essentially, you don't own the car when you lease; you are renting it. When you lease, you agree to have the car serviced according to the terms of the lease. If you don't service the car as ... 't. You should check with other Toyota dealers in the area to see if their service fees are the same.

What can my daughter do about her college roommate who allowed her boyfriend to move into their shared apartment that is leased only for the two women?

Description : What can my daughter do about her college roommate who allowed her boyfriend to move into their shared apartment that is leased only for the two women?

Last Answer : I would have a talk with the girl's parents. Surely if the parents are paying for this apartment then they have a right to know . I bet they can get through to her! I can't believe she would be ... them that if he continues to live there, the boyfriend must take over her rent and she's moving out.

Pros and cons on surrendering a leased car?

Description : Pros and cons on surrendering a leased car?

Last Answer : If it’s leased don’t you have to give it back? or did i misunderstand?

How do I transfer my NY EZ Pass from a totaled car to a leased car?

Description : How do I transfer my NY EZ Pass from a totaled car to a leased car?

Last Answer : Any time you change the vehicle, you need to notify EZ Pass. Youcan do that from your online account, or you can call the CustomerService number - 1-800-333-TOLL(8655) - for clarification.

Typically, how long can you have a car leased?

Description : Typically, how long can you have a car leased?

Last Answer : You can negotiate a smart car lease but typically you will lease for 3 years because it is not smart to get into a long term lease. It is also important to get low monthly payments.

Cost B1 + rental value of owned land and rent paid by leased in land

Description : Cost B1 + rental value of owned land and rent paid by leased in land

Last Answer : Ans. Cost B2

Thetwo most common digital services are ________ service and______. A) switched/56; switched/64 B) switched/56; DDS C) DDS; swiched 64 D) leased; out-of-band

Description : Thetwo most common digital services are ________ service and______. A) switched/56; switched/64 B) switched/56; DDS C) DDS; swiched 64 D) leased; out-of-band

Last Answer : switched/56; DDS

Telephone companiesprovidetwotypes of analog services: analog _______services andanalog _____services. A) switched; in-band B) out-of-band; in-band C) switched; leased D) leased; out-of-band

Description : Telephone companiesprovidetwotypes of analog services: analog _______services andanalog _____services. A) switched; in-band B) out-of-band; in-band C) switched; leased D) leased; out-of-band

Last Answer : switched; leased

Internet access by transmitting digital data over the wires of a local telephone network is provided by  leased line  digital subscriber line  digital signal line  None of the Above

Description : Internet access by transmitting digital data over the wires of a local telephone network is provided by  leased line  digital subscriber line  digital signal line  None of the Above

Last Answer :  digital subscriber line

In empirical type of research, Re seacher looks for a).New chemical entities b).Loopholes in patents c).Studies the ways natural products work & then tries to make molecules that act similarly d).None

Description : In empirical type of research, Re seacher looks for a).New chemical entities b).Loopholes in patents c).Studies the ways natural products work & then tries to make molecules that act similarly d).None

Last Answer : a).New chemical entities

Is it possible to re-heat fried razor clams?

Description : Is it possible to re-heat fried razor clams?

Last Answer : If you enclose them in foil, you’ll steam the breading off them. Same problem plus the rubbery issue with microwave. I would carefully heat them in the oven just long enough to get them reasonably warm and re-crisp the exterior a bit.

Pick out the wrong statement. (A) In case of heat transfer by purely forced convection, GR /Re 2 ≤ 1 (B) The equivalent diameter of heat transfer for a duct of square cross￾section (having each side as 'x') is equal to 4x (C) Distillation process is not the same as evaporation (D) The effectiveness of nucleate boiling depends basically on the ease with which the bubbles are formed and detached from the heating surface

Description : Pick out the wrong statement. (A) In case of heat transfer by purely forced convection, GR /Re 2 ≤ 1 (B) The equivalent diameter of heat transfer for a duct of ... nucleate boiling depends basically on the ease with which the bubbles are formed and detached from the heating surface

Last Answer : (B) The equivalent diameter of heat transfer for a duct of square cross￾section (having each side as 'x') is equal to 4x

The Dittus-Boelter equation for convective heat transfer [(i.e. h = 0.023 (K/D) (Re) 0.8 (Pr) 0.4 ] cannot be used for (A) Low Reynold's number (B) Very low Grashoff number (C) Molten metals (D) All (A), (B) and (C)

Description : The Dittus-Boelter equation for convective heat transfer [(i.e. h = 0.023 (K/D) (Re) 0.8 (Pr) 0.4 ] cannot be used for (A) Low Reynold's number (B) Very low Grashoff number (C) Molten metals (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

In forced convection, the heat transfer depends on(A) Re, Pr (B) Re, Gr (C) Mainly Gr (D) Re only

Description : In forced convection, the heat transfer depends on (A) Re, Pr (B) Re, Gr (C) Mainly Gr (D) Re only

Last Answer : (A) Re, Pr

The characteristic dimensionless groups for heat transfer to a fluid flowing through a pipe in laminar flow are (A) Re.Gz (B) Nu, Pr (C) Nu, Pr, Re (D) Nu, Gz

Description : The characteristic dimensionless groups for heat transfer to a fluid flowing through a pipe in laminar flow are (A) Re.Gz (B) Nu, Pr (C) Nu, Pr, Re (D) Nu, Gz

Last Answer : (D) Nu, Gz

The Sieder-Tate correlation for heat transfer in turbulent flow in pipe gives Nu α Re 0.8 , where, Nu is the Nusselt number and Re is the Reynolds number for the flow. Assuming that this relation is valid, the heat transfer co-efficient varies with the pipe diameter (D) as (A) D-1.8 (B) D-0.2 (C) D0.2 (D) D1.8

Description : The Sieder-Tate correlation for heat transfer in turbulent flow in pipe gives Nu α Re 0.8 , where, Nu is the Nusselt number and Re is the Reynolds number for the flow. Assuming that this relation is valid, the heat transfer co-efficient ... pipe diameter (D) as (A) D-1.8 (B) D-0.2 (C) D0.2 (D) D1.8

Last Answer : (B) D-0.2

Heat transfer co-efficient equation for forced convection, Nu = 0.023 Re 0.8 . Pr n , is not valid, if the value of (A) n = 0.4 is used for heating (B) n = 0.3 is used for cooling (C) Reynolds number for the flow involved is > 10000 (D) Reynolds number for the flow involved is < 2100

Description : Heat transfer co-efficient equation for forced convection, Nu = 0.023 Re 0.8 . Pr n , is not valid, if the value of (A) n = 0.4 is used for heating (B) n = 0.3 is used for cooling (C) Reynolds number for the flow involved is > 10000 (D) Reynolds number for the flow involved is < 2100

Last Answer : (D) Reynolds number for the flow involved is < 2100

Which is NOT a correct statement?  A. A superheated vapor will not condense when small amount of heat re removed  B. An ideal gas is a gas that is not a superheated vapor  C. A saturated liquid can absorb as much heat as it can without vaporizing  D. Water at 1 atm and room temperature is subcooled

Description : Which is NOT a correct statement?  A. A superheated vapor will not condense when small amount of heat re removed  B. An ideal gas is a gas that is not a superheated vapor  C. A saturated ... absorb as much heat as it can without vaporizing  D. Water at 1 atm and room temperature is subcooled

Last Answer : An ideal gas is a gas that is not a superheated vapor

For the redox reaction `Zn+NO_(3)^(-)rarr Zn^(2+)+NH_(4)^(-)` is basic medium, coefficients of `Zn, NO_(3)^(-) and OH^(-)` in the balanced equation re

Description : For the redox reaction `Zn+NO_(3)^(-)rarr Zn^(2+)+NH_(4)^(-)` is basic medium, coefficients of `Zn, NO_(3)^(-) and OH^(-)` in the balanced equation re

Last Answer : For the redox reaction `Zn+NO_(3)^(-)rarr Zn^(2+)+NH_(4)^(-)` is basic medium, coefficients of `Zn, NO_(3)^(-) ... . 7, 4, 1 C. 4, 1, 10 D. 1, 4, 10

Enzymes are required in traces because they (A) Have high turnover number (B) Remain unused at the end of reaction and are re used (C) Show cascade effect (D) All correct

Description : Enzymes are required in traces because they (A) Have high turnover number (B) Remain unused at the end of reaction and are re used (C) Show cascade effect (D) All correct

Last Answer : Answer : D

Chemical reaction in which heat is evolved?

Description : Chemical reaction in which heat is evolved?

Last Answer : Exothermic reaction

Chemical reaction in which heat is ab- sorbed?

Description : Chemical reaction in which heat is ab- sorbed?

Last Answer : Endothermic reaction

A chemical reaction in which there is absorption of heat is called

Description : A chemical reaction in which there is absorption of heat is called

Last Answer : endothermic reaction.

A chemical reaction in which heat is liberated is called

Description : A chemical reaction in which heat is liberated is called

Last Answer : exothermic reaction.

What is a chemical reaction that releases energy by light or heat?

Description : What is a chemical reaction that releases energy by light or heat?

Last Answer : Need answer

What is the best term to describe a chemical reaction that absorbs heat energy?

Description : What is the best term to describe a chemical reaction that absorbs heat energy?

Last Answer : What is the answer ?

What is chemical reaction that gives off heat called?

Description : What is chemical reaction that gives off heat called?

Last Answer : Exothermic reactions give off heat.

An enzyme promotes a chemical reaction by (A) Lowering the energy of activation (B) Causing the release of heat which acts as a primer (C) Increasing molecular motion (D) Changing the free energy difference between substrate and product

Description : An enzyme promotes a chemical reaction by (A) Lowering the energy of activation (B) Causing the release of heat which acts as a primer (C) Increasing molecular motion (D) Changing the free energy difference between substrate and product

Last Answer : Answer : A

Analogy between mass and heat transfer is not applicable in case of (A) Same velocity profile or equal eddy diffusivities (B) Thermal or pressure mass diffusion (C) Viscous heating or chemical reaction (D) Both (B) and (C)

Description : Analogy between mass and heat transfer is not applicable in case of (A) Same velocity profile or equal eddy diffusivities (B) Thermal or pressure mass diffusion (C) Viscous heating or chemical reaction (D) Both (B) and (C)

Last Answer : (D) Both (B) and (C)

The Graetz number is concerned with the (A) Mass transfer between a gas and a liquid (B) Absorption with chemical reaction (C) Heat transfer in turbulent flow (D) Heat transfer in laminar flow

Description : The Graetz number is concerned with the (A) Mass transfer between a gas and a liquid (B) Absorption with chemical reaction (C) Heat transfer in turbulent flow (D) Heat transfer in laminar flow

Last Answer : (D) Heat transfer in laminar flow

The role of a catalyst in a chemical reaction is to change the (A) Equilibrium constant (B) Activation energy (C) Final products (D) Heat of reaction

Description : The role of a catalyst in a chemical reaction is to change the (A) Equilibrium constant (B) Activation energy (C) Final products (D) Heat of reaction

Last Answer : (B) Activation energy

Catalytic action in a catalytic chemical reaction follows from the ability of catalyst to change the (A) Activation energy (B) Equilibrium constant (C) Heat of reaction (D) None of these

Description : Catalytic action in a catalytic chemical reaction follows from the ability of catalyst to change the (A) Activation energy (B) Equilibrium constant (C) Heat of reaction (D) None of these

Last Answer : (A) Activation energy

The energy of activation of a chemical reaction: (A) Is same as heat of reaction at constant pressure (B) Is the minimum energy which the molecules must have before the reaction can take place (C) Varies as fifth power of the temperature (D) Both (B) and (C)

Description : The energy of activation of a chemical reaction: (A) Is same as heat of reaction at constant pressure (B) Is the minimum energy which the molecules must have before the reaction can take place (C) Varies as fifth power of the temperature (D) Both (B) and (C)

Last Answer : (B) Is the minimum energy which the molecules must have before the reaction can take place

Pick out the correct statement. (A) A chemical reaction accompanied by absorption of heat is called an exothermic reaction (B) A chemical reaction accompanied by evolution of heat is called an endothermic reaction (C) The rate constant for a first order reaction does not change on changing the concentration units (D) Chemical equilibrium state is dynamic in nature

Description : Pick out the correct statement. (A) A chemical reaction accompanied by absorption of heat is called an exothermic reaction (B) A chemical reaction accompanied by evolution of heat is called an ... does not change on changing the concentration units (D) Chemical equilibrium state is dynamic in nature

Last Answer : (C) The rate constant for a first order reaction does not change on changing the concentration units

The catalyst in a first order chemical reaction changes the (A) Equilibrium constant(B) Activation energy(C) Heat of formation of the product(D) Heat of reaction

Description : The catalyst in a first order chemical reaction changes the (A) Equilibrium constant (B) Activation energy (C) Heat of formation of the product (D) Heat of reaction

Last Answer : (B) Activation energy

If the molar heat capacities (Cp or Cv) of the reactants and products of a chemical reaction are identical, then, with the increase in temperature, the heat of reaction will (A) Increase (B) Decrease (C) Remain unaltered (D) Increase or decrease; depends on the particular reaction

Description : If the molar heat capacities (Cp or Cv) of the reactants and products of a chemical reaction are identical, then, with the increase in temperature, the heat of reaction will (A) Increase (B) Decrease (C) Remain unaltered (D) Increase or decrease; depends on the particular reaction

Last Answer : (C) Remain unaltered

When an isolated thermodynamic system executes a process, (A) Work is done (B) Heat transfer takes place (C) Mass flow occurs across the boundary of the system (D) No chemical reaction takes place within the system

Description : When an isolated thermodynamic system executes a process, (A) Work is done (B) Heat transfer takes place (C) Mass flow occurs across the boundary of the system (D) No chemical reaction takes place within the system

Last Answer : D) No chemical reaction takes place within the system

Pick up the incorrect statement from the following: (A) The degree of grinding of cement, is called fineness (B) The process of changing cement paste into hard mass, is known as setting of cement (C) The phenomenon by virtue of which cement does not allow transmission of sound, is known as soundness of cement (D) The heat generated during chemical reaction of cement with water, is known as heat of hydration

Description : Pick up the incorrect statement from the following: (A) The degree of grinding of cement, is called fineness (B) The process of changing cement paste into hard mass, is known as setting of ... (D) The heat generated during chemical reaction of cement with water, is known as heat of hydration

Last Answer : Answer: Option C

Which of the following events is heat exchange involved?  a. when there is a phase change  b. when there is a chemical reaction  c. when the gas expands adiabatically  d. when there is difference in temperature

Description : Which of the following events is heat exchange involved?  a. when there is a phase change  b. when there is a chemical reaction  c. when the gas expands adiabatically  d. when there is difference in temperature

Last Answer : when the gas expands adiabatically

The browning reaction due to chemical reaction between an amino acid and a reducing sugar, usually requiring heat is called as _____: a. Dextrinization b. Maillard reaction c. Scorching d. Caramelization

Description : The browning reaction due to chemical reaction between an amino acid and a reducing sugar, usually requiring heat is called as _____: a. Dextrinization b. Maillard reaction c. Scorching d. Caramelization

Last Answer : b. Maillard reaction

What happens when a catalyst is added to a system at equilibrium? A The reaction follows an alternative pathway of lower activation energy. B The heat of reaction decreases. C The potential energy of the reactants decreases. D The potential energy of the products decreases. E The rate of chemical reaction decreases.

Description : What happens when a catalyst is added to a system at equilibrium? A The reaction follows an alternative pathway of lower activation energy. B The heat of reaction decreases. C The potential ... decreases. D The potential energy of the products decreases. E The rate of chemical reaction decreases.

Last Answer : A The reaction follows an alternative pathway of lower activation energy.