State and Path Variables, Functions
Trending Questions
Q. Among the following, the state functions is/are :
- Internal energy
- Irreversible expansion work
- Reversible expansion work
- Molar enthalpy
Q. For an ideal gas, consider only P-V work in going from an initial state X to the final state Z . The final state Z can be reached by either of the two paths shown in the figure. Which of the following choice(s) is(are) correct?
[Take △S as change in entropy and w as work done]
[Take △S as change in entropy and w as work done]
- △SX→Z=△SX→Y+△SY→Z
- wX→Z=wX→Y+wY→Z
- wX→Y→Z≠wX→Y
- △SX→Y→Z=△SX→Y
Q. The intensive property among these quantities is
- Enthalpy
- Mass/volume
- Mass
- Volume
Q.
Which one of the following must strictly change in an adiabatic process?
pressure
volume
concentration
temperature
Q. Which of the following statements is/are false?
- Work is a state function.
- Temperature is a state function.
- Change in the state is completely defined when the initial and final states are specified.
- Work appears at the boundary of the system.
Q.
Which of the following properties is not a function of state?
concentration
internal energy
enthalpy
entropy
Q. Work done on or by a gas, in general depends upon the
- Initial state only
- Final state only
- Both initial and final states only
- Initial state, final state and the path
Q. Which of the following is a perfect differential
- dq
- dw
- dU
- Both a and b
Q. Which of the following gas(es) will have highest degrees of freedom.
- He
- H2
- O2
- Both b and c
Q. Which of the following is a state function?
- Pressure
- Volume
- Temperature
- All of these
Q. Enthalpy is a state function
- True
- False
Q. For an ideal gas, consider only P-V work in going from an initial state X to the final state Z . The final state Z can be reached by either of the two paths shown in the figure. Which of the following choice(s) is(are) correct?
[Take △S as change in entropy and w as work done]
[Take △S as change in entropy and w as work done]
- △SX→Z=△SX→Y+△SY→Z
- wX→Z=wX→Y+wY→Z
- wX→Y→Z≠wX→Y
- △SX→Y→Z=△SX→Y
Q.
Which out of the following is not a state function?
free energy
enthalpy
entropy
work done