Chemical Engineering Thermodynamics

461. When a system is in equilibrium for all possible processes, the differential or finite change of entropy is

1. < 0
2. > 0
3. 0
4. None of these

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462. When dilute aqueous solutions of two salts are mixed, the process is associated with

1. Decrease in temperature
2. Increase in temperature
3. No change in temperature
4. Change in temperature which is a function of composition

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463. When liquid and vapour phase of multi-component system are in equilibrium (at a given temperature and pressure), then chemical potential of each component is

1. Same in both the phases
2. Zero in both the phases
3. More in vapour phase
4. More in liquid phase

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464. When liquid and vapour phases of one component system are in equilibrium (at a given temperature and pressure), the molar free energy is

1. More in vapour phase
2. More in liquid phase
3. Same in both the phases
4. Replaced by chemical potential which is more in vapour phase

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465. When pressure is applied on the system, ice ↔ water, then

1. Equilibrium cannot be established
2. More ice will be formed
3. More water will be formed
4. Evaporation of water will take place

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466. Which is a state function?

1. Specific volume
2. Work
3. Pressure
4. Temperature

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467. Which is an example of closed system?

1. Air compressor
2. Liquid cooling system of an automobile
3. Boiler
4. None of these

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468. Which is not a refrigerant?

1. SO₂
2. NH3
3. CCl2F2
4. C2H4Cl2

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469. Which is not constant for an ideal gas?

1. (∂P/∂V)T
2. (∂V/∂T)P
3. (∂P/∂V)V
4. All (A), (B) & (C)

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470. Which law of the thermodynamics provides basis for measuring the thermodynamic property?

1. First law
2. Zeroth law
3. Third law
4. Second law

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