Chemical Engineering Thermodynamics

151. For a thermodynamic system containing 'x' chemical species, the maximum number of phases that can co-exist at equilibrium is

1. x
2. x + 1
3. x + 2
4. x + 3

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152. For an exothermic reaction

1. Only enthalpy change (ΔH) is negative
2. Only internal energy change (ΔE) is negative
3. Both ΔH and ΔE are negative
4. Enthalpy change is zero

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153. For an ideal gas, the activity co-efficient is

1. Directly proportional to pressure
2. Inversely proportional to pressure
3. Unity at all pressures
4. None of these

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154. For an ideal gas, the chemical potential is given by

1. RT d ln P
2. R d ln P
3. R d ln f
4. None of these

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155. For an ideal gas, the enthalpy

1. Increases with rise in pressure
2. Decreases with rise in pressure
3. Is independent of pressure
4. Is a path function

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156. For an ideal gas, the internal energy depends upon its _________ only.

1. Molecular size
2. Temperature
3. Volume
4. Pressure

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157. For an ideal liquid solution, which of the following is unity?

1. Activity
2. Fugacity
3. Activity co-efficient
4. Fugacity co-efficient

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158. For an ideal solution, the value of activity co-efficient is

1. 0
2. 1
3. < 1
4. > 1

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159. For an incompressible fluid, the _________ is a function of both pressure as well as temperature.

1. Internal energy
2. Enthalpy
3. Entropy
4. All (A), (B) & (C)

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160. For an irreversible process involving only pressure-volume work

1. (dF)_T, p <0
2. (dF)_T, p = 0
3. (dF)_T, p > 0
4. (dA)_T, v >0

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