Chemical Engineering Thermodynamics

261. Internal energy is equal to the heat absorbed in case of a/an _________ process.

1. Constant volume
2. Polytropic
3. Adiabatic
4. Constant pressure

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262. Internal energy of an element at 1 atm and 25° C is _________ kcal/kg.mole.

1. 0
2. 273
3. 25
4. None of these

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263. Internal energy of an ideal gas

1. Increases with increase in pressure
2. Decreases with increase in temperature
3. Is independent of temperature
4. None of these

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264. Isentropic process means a constant _________ process.

1. Enthalpy
2. Pressure
3. Entropy
4. None of these

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265. Isobaric process means a constant process.

1. Temperature
2. Pressure
3. Volume
4. Entropy

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266. Isotherm on an enthalpy-concentration diagram, for an ideal solution will be a

1. Straight line
2. Sine curve
3. Parabola
4. Hyperbola

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267. It is desired to bring about a certain change in the state of a system by performing work on the system under adiabatic conditions.

1. The amount of work needed is path dependent
2. Work alone cannot bring out such a change of state
3. The amount of work needed is independent of path
4. More information is needed to conclude anything about the path dependence or otherwise of the work needed

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269. Joule-Thomson co-efficient depends on the

1. Pressure
2. Temperature
3. Both (A) & (B)
4. Neither (A) nor (B)

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270. Joule-Thomson co-efficient for a perfect gas is

1. Zero
2. Positive
3. Negative
4. None of these

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