The amount of heat required to change a boiling liquid to a gas at the same temperature depends on one of the following properties of the liquid. Does it depend on the liquid's: w) heat of fusion x) heat of vaporization y) temperature z) density

1 Answer

Answer :

ANSWER: X -- HEAT OF VAPORIZATION

Related questions

Description : The energy required to melt one mole of a solid at its melting point is called one of the following. w) the molar heat of fusion x) the molar hear of vaporization y) the molar heat of capacity z) the melting point

Last Answer : ANSWER: W -- THE MOLAR HEAT OF FUSION

Description : The change of a gas to a liquid is called: w) vaporization x) sublimation y) condensation z) freezing

Last Answer : ANSWER: Y -- CONDENSATION

Description : Which of the following terms refer to the amount of heat needed to raise the temperature of a unit mass of a substance through one degree? w) Heat of fusion x) Liquification heat y) Internal heat z) Specific heat

Last Answer : ANSWER: Z -- SPECIFIC HEAT

Description : The heat absorbed by a unit mass of a material at its holding point in order to convert the material into a gas at the same temperature.  a. Latent Heat of Sublimation  b. Latent Heat of Vaporization  c. Latent Heat of Fusion  d. Latent Heat Of Condensation

Last Answer : Latent Heat of Vaporization

Description : The term "laminar flow" is most often associated with the description of: w) conduction of sound by waves x) current flow in transistors y) effects of viscosity of liquids z) passage of light rays through a liquid

Last Answer : ANSWER: Y -- EFFECTS OF VISCOSITY OF LIQUIDS

Description : Steam at 100°C causes more severe burns than water at 100° C because – (1) steam has no specific heat capacity (2) steam has latent heat of vaporization (3) water has no specific heat capacity (4) water has latent heat of fusion

Last Answer : (2) steam has latent heat of vaporization Explanation: It is because steam releases its latent heat as it condenses, which is substantial. The heat of vaporization of steam is over 2000 J per gram. And when it releases that it's then 100 degree water, the same as boiling water.

Description : Most of the nuclear power plants operating in the United States are: w) pressurized water reactors x) boiling water reactors y) high-temperature gas-cooled reactors z) liquid-metal fast breeder reactors

Last Answer : ANSWER: W -- PRESSURIZED WATER REACTORS 

Description : Which of the following properties is lower for a solution than for the pure solvent? w) osmotic pressure x) vapor pressure y) temperature z) boiling point

Last Answer : ANSWER: X -- VAPOR PRESSURE

Description : Which of the following properties is greater for a solution than for the pure solvent? w) freezing point x) vapor pressure y) temperature z) boiling point

Last Answer : ANSWER: D -- BOILING POINT

Description : Vegetables are cooked in lesser time by adding a pinch of salt while cooking because (1) boiling point of water increases (2) latent heat of vaporization of water decreases (3) latent heat of vaporization of water increases (4) boiling point of water decreases

Last Answer : (1) boiling point of water increases Explanation: Adding salt raises the boiling point of water, which allows food to cook at higher temperature. The higher the temperature, the higher the rate of heat transfer between the food and water, thus it cooks more quickly.

Description : Water is not suitable as a calorimetric substance because it – (1) has high specific heat (2) is a good conductor (3) has high boiling point (4) low latent heat of vaporization

Last Answer : (1) has high specific heat Explanation: The specific heat of water is higher than all other common substances. Hence, water is used for heating purposes (as in hot water bottles) and for cooling ... the liquids, mercury has the lowest specific heat due to which it is used as a thermometric liquid.

Description : Vegetables are cooked in lesser time by adding a pinch of salt while cooking because (1) boiling point of water increases (2) latent heat of vaporization of water decreases (3) latent heat of vaporization of water increases (4) boiling point of water decreases 

Last Answer :  boiling point of water increases

Description : What is the amount of heat needed to turn 1kg of the substance at its boiling point from the liquid to the gaseous state?  A. Heat of fusion  B. Heat of vaporation  C. Heat of condensation  D. Heat of fission

Last Answer : Heat of vaporation

Description : What is a calorie? w) amount of heat required to raise one gram of water one degree Celsius. x) amount of work required to move one gram of water by one centimeter. y) amount of heat required to melt ice. z) amount of heat required to raise one gram of water one degree Fahrenheit

Last Answer : ANSWER: W -- AMOUNT OF HEAT REQUIRED TO RAISE ONE GRAM OF WATER ONE DEGREE CELSIUS

Description : Refractory metals are known for which of the following properties: w) lack of chemical reactivity x) low density y) high melting point z) high thermal conductivity

Last Answer : ANSWER: Y -- HIGH MELTING POINT

Description : A cobalt chloride solution soaked into a piece of cotton can be used as an indicator for changes in humidity levels. Pink indicates a high-humidity environment and blue a low-humidity environment. What ... the cobalt's waters of hydration. z) This is an illustration of the Schrodinger principle.  

Last Answer : ANSWER: Y -- THE LOSS AND READSORPTION OF THE COBALT'S WATERS OF HYDRATION.

Description : Which of the following molecules would have the smallest molar enthalpy of vaporization? w) Water x) Formaldehyde y) Methane z) Ammonia

Last Answer : ANSWER: Y -- METHANE

Description : Immiscible liquids: w) are not mutually soluble x) dissolve in each other y) dissolve in more than one liquid z) are unstable and chemically react e) do not exist

Last Answer : ANSWER: W -- ARE NOT MUTUALLY SOLUBLE

Description : Surface tension of liquids is the result of which the following: w) interaction of a liquid with its container x) unbalanced forces on the liquid's surface molecules y) adhesive forces of the liquid z) interaction of the liquid's surface molecules and the applied pressure

Last Answer : ANSWER: X -- UNBALANCED FORCES ON THE LIQUID'S SURFACE MOLECULES

Description : The non-relativistic mass of an object w) must be the same as its weight x) depends on where you measure it y) does not change with increasing velocity z) is greatest at the poles

Last Answer : ANSWER: Y -- DOES NOT CHANGE WITH INCREASING VELOCITY

Description : At lower temperatures and pressures, the latent heat of vaporization of a refrigerant (a) decreases (b) increases (c) remains same (d) depends on other factors

Last Answer : Ans: b

Description : Leidenfrost point is a term concerned with the (A) Condensation of the saturated vapor on a cold surface (B) Concentration of a corrosive solution by evaporation (C) Heat transfer between two highly viscous liquids (D) Boiling of a liquid on a hot surface

Last Answer : (D) Boiling of a liquid on a hot surface

Description : Compared to Chlorine, Bromine has: w) smaller atomic size x) higher density y) lower boiling point z) greater number of outer electrons

Last Answer : ANSWER: X -- HIGHER DENSITY

Description : Of the following, which is the best fuel for a nuclear fusion reactor: w) hydrogen x) lithium y) deuterium z) helium 

Last Answer : ANSWER: Y -- DEUTERIUM

Description : What process produces most of the energy that is radiated by the Sun? w) gravitational contraction x) chemical combustion y) nuclear fusion z) nuclear fission

Last Answer : ANSWER: Y -- NUCLEAR FUSION

Description : The splitting of an atomic nucleus is called: w) fission x) fusion y) cleavage z) separation

Last Answer : ANSWER: W -- FISSION

Description : In the sun, helium is produced from hydrogen by: w) radioactive decay x) disintegration y) fission z) fusion

Last Answer : ANSWER: Z -- FUSION

Description : A colligative property depends on: w) chemical properties of particles in system x) physical properties of particles in system y) number of particles present in system z) all of the above

Last Answer : ANSWER: Y -- NUMBER OF PARTICLES PRESENT IN SYSTEM

Description : The temperature of a gas measures the: w) number of calories of heat present x) average kinetic energy of the particles in the gas y) exact number of particles in the gas z) potential energy of the gas

Last Answer : ANSWER: X -- AVERAGE KINETIC ENERGY OF THE PARTICLES IN THE GAS 

Description : The critical temperature is the temperature: w) above which a substance cannot be vaporized x) at which the density is a minimum y) at which solid, liquid, and vapor are in equilibrium z) above which the substance cannot be liquified.

Last Answer : ANSWER: Z -- ABOVE WHICH THE SUBSTANCE CANNOT BE LIQUIFIED. 

Description : The noble gases have low boiling points because: w) their ionization potentials are very low x) only weak Van der Waals forces hold the atoms together y) they are produced by the fractional distillation of liquid air z) they have eight electrons in the outer shell

Last Answer : ANSWER: X -- ONLY WEAK VAN DER WAALS FORCES HOLD THE ATOMS TOGETHER

Description : Reactors in commercial nuclear power plants in the U.S. are often referred to as thermal reactors. A thermal reactor uses: w) fissionable plutonium-239 as fuel. x) a relatively low heat output. y) neutrons moderated to relatively low energies. z) liquid sodium as a coolant.

Last Answer : ANSWER: Y -- NEUTRONS MODERATED TO RELATIVELY LOW ENERGIES.

Description : The process of a solid converting directly into a gas is called: w) fusion x) sublimation y) condensation z) distillation

Last Answer : ANSWER: X -- SUBLIMATION 

Description : What refers to the amount of energy absorbed or released during a phase-change process?  A. Molar heat  B. Latent heat  C. Vaporization heat  D. Condensation heat

Last Answer : Latent heat

Description : On which of the following does the capacity of a kilogram of air for holding water depend? w) the air pressure x) the air temperature y) the dust content of the air z) the ions in the air

Last Answer : ANSWER: X -- THE AIR TEMPERATURE 

Description : For a substance, density, solubility and melting point are examples of: w) physical properties x) amorphous properties y) chemical properties z) potential properties

Last Answer : ANSWER: W -- PHYSICAL PROPERTIES

Description : In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is (A) More (B) Less (C) Same (D) Unpredictable; depends on the particular reaction

Last Answer : (C) Same

Description : In order to make a phase change from liquid to gas you must add energy equal to the what of vaporization?

Last Answer : Need answer

Description : Which of the following is NEVER used as a coolant in nuclear reactors: w) liquid nitrogen x) liquid sodium y) water z) helium gas

Last Answer : ANSWER: W -- LIQUID NITROGEN

Description : The formation of pockets of gas in a liquid is called: w) absorption x) cavitation y) adsorption z) dissolving

Last Answer : ANSWER: X -- CAVITATION

Description : Liquid "X" is at equilibrium with its vapor in a cylinder and piston apparatus. When the volume of the space above the liquid is 50 ml and the temperature 25!, the vapor pressure of "X" is 120 torr. What will the ... 25!C? Some liquid is always present. w) 30 torr x) 60 torr y) 120 torr z) 240 torr

Last Answer : ANSWER: Y -- 120 TORR

Description : What is the only non-metal element that is a liquid at room temperature and one atmosphere? w) bromine x) argon y) silicon z) selenium

Last Answer : ANSWER: W -- BROMINE

Description : The burnout heat flux in the nucleate boiling regime is not a function of the (A) Liquid density (B) Vapour density (C) Temperature difference (D) Heat of evaporation

Last Answer : (B) Vapour density

Description : What is the molecular mass of a gas that effuses through a small hole at twice the rate as oxygen gas at the same temperature. (The molecular mass of O2 is 32.) w) 8.0 atomic mass units x) 16 atomic mass units y) 48 atomic mass units z) 64 atomic mass units

Last Answer : ANSWER: W -- 8.0 ATOMIC MASS UNITS

Description : A sphere which has half the radius but twice the density of another sphere has: w) more mass x) less mass y) the same mass z) the same weight

Last Answer : ANSWER: X -- LESS MASS

Description : If a metallic object is heated, its density generally: w) increases x) decreases y) fluctuates randomly z) remains the same

Last Answer : ANSWER: X -- DECREASES

Description : The density of seawater is greater than that of fresh water. A boat will float: w) Higher in fresh water than in seawater x) Lower in fresh water than in seawater y) At the same level in both z) Any of the above, depending upon its shape

Last Answer : ANSWER: X -- LOWER IN FRESH WATER THAN IN SEAWATER

Description : At boiling point of liquids, its : (1) Temperature increases (2) Atmospheric pressure increases (3) Timperature remains increases (4) Vapour pressure decreases

Last Answer : (3) Timperature remains increases

Description : At boiling point of liquids, its – (1) Temperature increases (2) Atmospheric pressure increases (3) Temperature remains constant (4) Vapour pressure decreases

Last Answer : (3) Temperature remains constant Explanation: An interesting property of matter is that its temperature remains constant during a phase change, assuming its surrounding pressure is constant. A liquid changes into gaseous state at a constant temperature called its boiling point.

Description : At boiling point of liquids, its (1) Temperature increases (2) Atmospheric pressure increases (3) Temperature remains constant (4) Vapour pressure decreases 

Last Answer : Temperature remains constant