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 : What refers to the amount of heat needed to raise the temperature of an object by one degree Celsius or 1K? A. Heat capacity B. Specific heat C. Latent heat D. Molar heat
Last Answer : Heat capacity
Description : The ______ of a substance is the amount of heat that must be added or removed from a unit mass of the substance to change its temperature by one degree. A. Latent heat of fusion B. Molar heat C. Specific heat capacity D. Specific heat
Last Answer : Specific heat capacity
Description : What is the latent heat of vaporization of water at 1 atm? A. 2314.8 kJ/kg B. 2257.1 kJ/kg C. 2511.7 kJ/kg D. 2429.8 kJ/kg
Last Answer : 2257.1 kJ/kg
Description : What is defined as the energy required to raise the temperature of a unit mass of a substance by one degree? A. Latent heat of fusion B. Molar heat C. Specific heat capacity D. Specific heat
Last Answer : Specific heat
Description : The amount of heat energy per kilogram that must be added or removed when a substance changes from one phase to another. a. specific heat b. heat of expansion c. latent heat d. useful heat
Last Answer : latent heat
Description : What is the heat capacity of one gram of a substance? A. Molecular heat B. Specific heat C. Latent heat D. Molar heat
Description : What is the heat capacity of one mole of substance? A. Molecular heat B. Specific heat C. Latent heat D. Molar heat
Last Answer : Molar heat
Description : The changing of solid directly to vapor without passing through liquid state is called a. Evaporation b. Vaporization c. Sublimation d. Condensation
Last Answer : Sublimation
Description : What is defined as the direct conversion of a substance from the solid to the vapor state or vice versa without passing the liquid state? A. Condensation B. Vaporization C. Sublimation D. Cryogenation
Description : What refers to the heat needed to change the temperature of the substances without changing its phases? a. Latent heat b. Sensible heat c. Specific heat d. entropy
Last Answer : Sensible heat
Description : What is the extremely large amount of energy associated with the strong bonds within the nucleus of the atom itself called? A. Chemical energy B. Latent energy C. Phase energy D. Nuclear energy
Last Answer : Nuclear energy
Description : Heat that cause change in phase without a change in temperature. a) Sensible Heat b) Latent Heat c) Thermo Heat d) None of the above
Last Answer : Latent Heat
Description : Heat that cause change in temperature at without a change in phase. a) Sensible Heat b) Latent Heat c) Thermo Heat d) None of the above
Last Answer : Sensible Heat
Description : What refers to the measure of the disorder present in a given substance or system? A. Enthalpy B. Entropy C. Heat capacity D. Molar heat
Last Answer : Entropy
Description : What is the internal energy associated with the atomic bonds in a molecule called? A. Chemical energy B. Latent energy C. Phase energy D. State energy
Last Answer : Chemical energy
Description : What is the internal energy associated with the phase of a system called? A. Chemical energy B. Latent energy C. Phase energy D. Thermal energy
Last Answer : Latent energy
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 the amount of heat needed to turn 1 kg of the substance at its melting point from the solid to liquid state? A. Heat of fusion B. Heat of vaporation C. Heat of condensation D. Heat of fission
Last Answer : Heat of fusion
Description : Heat which causes a change in temperature of a substance. a. Latent heat b. Sensible heat c. Specific heat d. Heat of Fusion
Description : The heat Q per unit mass per degree change in temperature that must be supplied or removed to change the temperature of a substance. a. Specific Heat Capacity b. Latent Heat c. Heat of Transformation d. Internal Heat
Last Answer : Specific Heat Capacity
Description : What is the measure of the energy that is no longer available to perform useful work within the current environment? a. enthalpy b. entropy c. internal energy d. latent heat
Last Answer : entropy
Description : What is known as the total heat and heat content at various times in the history? a. enthalpy b. entropy c. internal energy d. latent heat
Last Answer : enthalpy
Description : What are the only two forms of energy interactions associated with a closed system? A. Kinetic energy and heat B. Heat transfer and work C. Thermal energy and chemical energy D. Latent energy and thermal energy
Last Answer : Heat transfer and work
Description : Utilizing the answer to the previous problem, estimate the overall or average increase in temperature ( ΔT) of the concrete roof from the energy absorbed from the sun during a12hour day. Assume that all of the radiation absorbed goes into ... °C b. 8.9°C c. 9.9°C d. 10.9°C formula: ΔQ = m c ΔT
Last Answer : 7.9 °C
Description : What refers to the amount of heat removed from the cooled space in BTS’s for 1 watt-hour of electricity consumed? A. Cost efficiency rating B. Energy efficiency rating C. Coefficient of performance D. Cost of performance
Last Answer : Energy efficiency rating
Description : What refers to any change that a system undergoes from one equilibrium state to another equilibrium state? A. Process B. Path C. Phase D. Cycle
Last Answer : Process
Description : What refers to the series of state through which a system passes during a process? A. Path B. Phase C. Cycle D. Direction
Last Answer : Path
Description : What refers to the heating of the earth’s atmosphere not caused by direct sunlight but by infrared light radiated by the surface and absorbed mainly by atmospheric carbon dioxide? A. Greenhouse effect B. Global warming C. Thermal rise effect D. Ozone effect
Last Answer : Greenhouse effect
Description : The area under the temperatureentropy curve (T – s curve) of any thermodynamic process represents A. heat absorbed B. heat rejected C. either (a) or (b) D. none of these
Last Answer : C. either (a) or (b)
Description : In order that a cycle be reversible, following must be satisfied (a) free expansion or friction resisted expansion/compression process should not be encountered (b) when heat is being absorbed, temperature of hot ... sub-stance should be same (d) all of the above (e) none of the above.
Last Answer : Answer : d
Description : What is defined as the quantity of heat needed to raise the temperature of one kilogram of water by one degrees Celsius? a. Kilojoule b. Btu c. Kilocalorie d. Latent heat
Last Answer : Kilocalorie
Description : Which of the following cannot be measured by a thermometer? a. Latent Heat b. Sensible Heat c. Specific Heat d. Heat of Fusion
Description : Who coined the term latent heat? a. John Thompson b. Studey Baker c. Joe di Maggio d. Joseph Black
Last Answer : Joseph Black
Description : What is the latent heat of fusion of water at 1 atm? A. 331.1 kJ/kg B. 332.6 kJ/kg C. 333.7 kJ/kg D. 330.7 kJ/kg
Last Answer : 333.7 kJ/kg
Description : Defined as the ratio of weight of dry steam to the weight of stuff. a. dryness fraction b. Vaporization c. fusion d. super heated steam
Last Answer : dryness fraction
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
Description : What is considered as the heat content of a system? A. Enthalpy B. Entropy C. Internal heat D. Molar heat
Last Answer : Enthalpy
Description : What is the energy absorbed during chemical reaction under constant volume conditions? A. Entropy B. Ion exchange C. Enthalpy D. Enthalpy of reaction
Description : The value for the ΔU of a system is -120 J. If the system is known to have absorbed 420 J of heat, how much work was done? a. -540 J b. -640 J c. -740 J d. -840 J formula: ΔU = q +w
Last Answer : -540 J
Description : The coefficient of performance (COP) is the ratio between the: A. Power consumption in watts and heat absorbed per hour B. Heat absorbed per hour and the power consumption in watts C. Work required and the absorbed heat D. Absorbed heat and work required
Last Answer : Absorbed heat and work required
Description : Which of the following is the correct statement of the second law of thermodynamics? A. It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy ... energy, which can be obtained from a given quantity of heat energy. D. all of the above
Last Answer : Answer: D
Description : During throttling process (a) heat exchange does not take place (b) no work is done by expanding steam (c) there is no change of internal energy of steam (d) all of the above (e) entropy decreases.
Description : What refers to the pressure at which a pure substance changes phase at a given temperature? A. Equilibrium pressure B. Saturation pressure C. Superheated pressure D. Subcooled pressure
Last Answer : Saturation pressure
Description : What refers to the temperature at which a pure substance changes phase at a given pressure? A. Equilibrium temperature B. Saturation temperature C. Superheated temperature D. Subcooled temperature
Last Answer : Saturation temperature
Description : What refers to the series of states through which a system passes during the process? a. path b. quasi- static steps c. reversibility moves d. irreversibility moves
Last Answer : path
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
Description : What refers to the thermodynamic properties which are independent on the amount of the substance present? a. Extensive property b. Intensive properties c. Reversible properties d. Irreversible properties
Last Answer : Intensive properties
Description : What refers to the thermodynamic properties which are dependent on the amount of the substance present? a. Extensive property b. Intensive properties c. Reversible properties d. Irreversible properties
Last Answer : Extensive property
Description : The mass of one mole of a substance in grams is known as ______. A. Molar weight B. Molar mass C. Molar volume D. Molar constant
Last Answer : Molar mass