How is Hesss law applied in calculating enthalpy?

How is Hesss law applied in calculating enthalpy?
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If you need to reverse the following reaction and multiply it by 2 in order for it to be an intermediate reaction in a Hess's law problem what would be the final value for the enthalpy of reaction yo?

Description : If you need to reverse the following reaction and multiply it by 2 in order for it to be an intermediate reaction in a Hess's law problem what would be the final value for the enthalpy of reaction yo?

Last Answer : 2820 kJ

If you need to reverse the following reaction in order for it to be an intermediate reaction in a Hess's law problem what would be the final value for the enthalpy of rea?

Description : If you need to reverse the following reaction in order for it to be an intermediate reaction in a Hess's law problem what would be the final value for the enthalpy of rea?

Last Answer : 286 kJ

"If different processes are used to bring about the same chemical reaction, the enthalpy change is same for all of them". This is __________ law. (A) Hess's (B) Kirchoff's (C) Lavoisier and Laplace (D) None of these

Description : "If different processes are used to bring about the same chemical reaction, the enthalpy change is same for all of them". This is __________ law. (A) Hess's (B) Kirchoff's (C) Lavoisier and Laplace (D) None of these

Last Answer : (A) Hess's

Explain Hess’s law.

Description : Explain Hess’s law.

Last Answer : Ans. It states that the enthalpy change of the reaction remains the same whether the reaction is carried out in one step or several steps, i.e., ∆H = ∆H1 + ∆H2 + ∆H3 +…………

State Hess’s law of constant heat summation.Give its two applications.

Description : State Hess’s law of constant heat summation.Give its two applications.

Last Answer : Ans. Hess's law states that enthalpy change for a reaction is same whether the reaction occurs in single step or several steps. OR If a reaction occurs in several steps then ,its standard enthalpy of ... the formation of the compound (ii) It is used to calculate Lattice enthalpy of an ionic solid.

_________ explains the equilibrium constant for any chemical reaction. (A) Henry's law (B) Law of mass action (C) Hess's law (D) None of these

Description : _________ explains the equilibrium constant for any chemical reaction. (A) Henry's law (B) Law of mass action (C) Hess's law (D) None of these

Last Answer : (B) Law of mass action

What is sometimes known as the “Fourth-power law”?  A. Kirchhoff’s radiation law  B. Newton’s law of cooling  C. Stefan-Boltzmann law  D. Hess’s law

Description : What is sometimes known as the “Fourth-power law”?  A. Kirchhoff’s radiation law  B. Newton’s law of cooling  C. Stefan-Boltzmann law  D. Hess’s law

Last Answer : Stefan-Boltzmann law

How Harry hess's hypothesis explain seafloor movement?

Description : How Harry hess's hypothesis explain seafloor movement?

Last Answer : Harry hess' hypothesis was hot/less dense material rises up theEarth's crust toward the mid-ocean ridges. When the seafloor breaksapart, magma is forced upward and through the cracks. It cools, ... it moves away from the mid-oceanridge, it becomes denser and sinks. This helps form ridges.

Which of the following statements about continuous cardiac output monitoring are true? A. Continuous cardiac output monitoring may unmask events not detected by intermittent cardiac output measurements. B. Continuous cardiac output monitoring by the thermodilution method requires continuous infusion of fluid injectate at a constant rate and temperature. C. The major advantage of the Fick method over the thermodilution method of calculating cardiac output is that it is noninvasive, requiring only the determination of oxygen consumption by respiratory gas analysis. D. The technique of thoracic electrical bioimpedance utilizes sensors to determine stroke volume by detecting changes in resistance to a small, applied alternating current.

Description : Which of the following statements about continuous cardiac output monitoring are true? A. Continuous cardiac output monitoring may unmask events not detected by intermittent cardiac output measurements. ... stroke volume by detecting changes in resistance to a small, applied alternating current.

Last Answer : Answer: AD DISCUSSION: Various techniques are available to measure cardiac output continuously. The advantages of continuous cardiac output monitoring, as compared with intermittent methods, are (1) ... function of the stroke volume, which then can be used to calculate the cardiac output

When calculating Newton's Second Law of Motion what is the resulting unit of measurement called?

Description : When calculating Newton's Second Law of Motion what is the resulting unit of measurement called?

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Formular for calculating probability under law of compliment?

Description : Formular for calculating probability under law of compliment?

Last Answer : P(A)=1-(A)

Third law of thermodynamics is helpful in (A) Prediction of the extent of a chemical reaction (B) Calculating absolute entropies of substances at different temperature (C) Evaluating entropy changes of chemical reaction (D) Both (B) and (C)

Description : Third law of thermodynamics is helpful in (A) Prediction of the extent of a chemical reaction (B) Calculating absolute entropies of substances at different temperature (C) Evaluating entropy changes of chemical reaction (D) Both (B) and (C)

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

(i)State why heat changes in physical and chemical processes are indicated by enthalpy changes and not by entropy changes? (ii)What are the limitations of First Law of thermodynamics?

Description : (i)State why heat changes in physical and chemical processes are indicated by enthalpy changes and not by entropy changes? (ii)What are the limitations of First Law of thermodynamics?

Last Answer : (i) Most of the processes are carried out in an open system i.e, at constant pressure. (ii)(a) Can’t explain the feasibility of the reaction. (b)It poses no restriction on the direction of flow of heat. (c)Practically it is not possible to convert the heat energy into an equivalent amount of work.

The 1st Law of Thermodynamics on what principle?  a. Conservation of Energy  b. Conservation of mass  c. Enthalpy  d. Isometric

Description : The 1st Law of Thermodynamics on what principle?  a. Conservation of Energy  b. Conservation of mass  c. Enthalpy  d. Isometric

Last Answer : Conservation of Energy

The first law of thermodynamics is based on which of the following principles?  a. conservation of mass  b. the enthalpy-entropy relationship  c. action – reaction  d. conservation of energy

Description : The first law of thermodynamics is based on which of the following principles?  a. conservation of mass  b. the enthalpy-entropy relationship  c. action – reaction  d. conservation of energy

Last Answer : conservation of energy

A function of state that is associated with disorder in the system and environment.  a. enthalpy  b. entropy  c. law of diminishing return  d. Lenz’ Law

Description : A function of state that is associated with disorder in the system and environment.  a. enthalpy  b. entropy  c. law of diminishing return  d. Lenz’ Law

Last Answer : entropy

What predicts the approximate molar specific heat at high temperatures from the atomic weight?  A. Third law of thermodynamics  B. Law of Dulong and Petit  C. Mollier diagram  D. Pressure-enthalpy diagram

Description : What predicts the approximate molar specific heat at high temperatures from the atomic weight?  A. Third law of thermodynamics  B. Law of Dulong and Petit  C. Mollier diagram  D. Pressure-enthalpy diagram

Last Answer : Law of Dulong and Petit

According to first law of thermodynamics  (a) work done by a system is equal to heat transferred by the system  (b) total internal energy of a system during a process remains constant  (c) internal energy, enthalpy and entropy during a process remain constant  (d) total energy of a system remains constant

Description : According to first law of thermodynamics  (a) work done by a system is equal to heat transferred by the system  (b) total internal energy of a system during a process remains constant  ( ... , enthalpy and entropy during a process remain constant  (d) total energy of a system remains constant

Last Answer : Answer : d

In a boiler enthalpy of water supplied was 2000 kJ/kg. Enthalpy being added by fuel combustion is 3200 kJ/kg. Using first law of thermodynamics, find amount of heat supplied if steam generation rate is 10 tons per hour.

Description : In a boiler enthalpy of water supplied was 2000 kJ/kg. Enthalpy being added by fuel combustion is 3200 kJ/kg. Using first law of thermodynamics, find amount of heat supplied if steam generation rate is 10 tons per hour.

Last Answer : Heat supplied Q = m (h2-h1) …….(Steady flow energy equation for boiler) ; h2=3200 KJ/kg h1=2000 KJ/kg m = 10 Tons /hour = (10 x 1000)/3600 kg/sec = 2.77 Kg/sec Q = 2.77(3200-2000) = 3324 KJ/sec heat supplied for 10 Tons/hr steam generation

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Description : Calculating molarity.... am I doing it right?

Last Answer : answer:I’m sorry, I’m having trouble following your solution with your abbreviations. What do you mean by mg? Milligrams? Moles per gram? Grams per mole? What do you mean by mass wt? Mass weight? What does that mean? Do you mean molecular weight? Sorry, I haven’t done chemistry for a while.

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Are studio audience album/book give-aways considered, when calculating Billboard/Bestseller stats?

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Without actually calculating the cubes, find the value of 36xy-36xy = 0 -Maths 9th

Description : Without actually calculating the cubes, find the value of 36xy-36xy = 0 -Maths 9th

Last Answer : Find the value of 36xy-36xy = 0.

Without actually calculating the cubes, find the value of 36xy-36xy = 0 -Maths 9th

Description : Without actually calculating the cubes, find the value of 36xy-36xy = 0 -Maths 9th

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Without actually calculating the cubes, find the value of: (-3/4)3 + (-5/8)3 + (11/8)3 -Maths 9th

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Ron is calculating the area of the rectangle. He knows the length is 5 1/4 feet and the width is 3 1/2 feet. What is the area Solve by converting each mixed number to an improper number and multiplying. Simplify if necessary?

Description : Ron is calculating the area of the rectangle. He knows the length is 5 1/4 feet and the width is 3 1/2 feet. What is the area Solve by converting each mixed number to an improper number and multiplying. Simplify if necessary?

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In what year did you invent the calculating machine ?

Last Answer : In 1645 invented the calculating machine.

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