Thermodynamics

141. Which of the following parameters is constant for a mole for most of the gases at a given temperature and pressure

1. enthalpy
2. volume
3. mass
4. entropy
5. specific volume.

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142. Which of the following processes are thermodynamically reversible

1. throttling
2. free expansion
3. constant volume and constant pressure
4. hyperbolic and pV = C
5. isothermal and adiabatic.

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143. Which of the following processes is irreversible process

1. isothermal
2. adiabatic
3. throttling
4. all of the above
5. none of the above.

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144. Which of the following quantities is not the property of the system

1. pressure
2. temperature
3. specific volume
4. heat
5. density.

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145. Which of the following variables controls the physical properties of a perfect gas

1. pressure
2. temperature
3. volume
4. all of the above
5. atomic mass.

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146. Work done in a free expansion process is

1. =+ ve
2. =-ve
3. zero
4. maximum
5. minimum.

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147. Work done in an adiabatic process between a given pair of end states depends on

1. the end states only
2. particular adiabatic process
3. the value of index n
4. the value of heattransferred
5. mass of the system.

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148. Work done is zero for the following process

1. constant volume
2. free expansion
3. throttling
4. all Of the above
5. none of the above.

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149. Zeroth law of thermodynamics

1. deals with conversion of mass and energy
2. deals with reversibility and irreversibility of process
3. states that if two systems are both in equilibrium with a third system, they are in thermal equilibrium with each other
4. deals with heat engines
5. does not exist.

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