Chemical Engineering Thermodynamics

141. For a constant volume process

1. dE = C_pdT
2. dE = C_vdT
3. dQ = dE + pdV
4. dW = pdV

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142. For a constant volume process _________ by the system is used only to increase the internal energy.

1. Heat absorbed
2. Work done
3. Both (A) & (B)
4. Neither (A) nor (B)

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143. For a cyclic process, a fixed ratio between heat and work

1. Always exists
2. May exist
3. Never exists
4. Is difficult to predict

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144. For a given substance at a specified temperature, activity is _________ to fugacity.

1. Directly proportional
2. Inversely proportional
3. Equal
4. None of these

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145. For a multi-component system, the term chemical potential is equivalent to the

1. Molal concentration difference
2. Molar free energy
3. Partial molar free energy
4. Molar free energy change

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146. For a real gas, the chemical potential is given by

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

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147. For a reversible 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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148. For a single component two phase mixture, the number of independent variable properties are

1. Two
2. One
3. Zero
4. Three

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149. For a spontaneous process, free energy

1. Is zero
2. Increases
3. Decreases whereas the entropy increases
4. And entropy both decrease

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150. For a stable phase at constant pressure and temperature, the fugacity of each component in a binary system _________ as its mole fraction increases.

1. Decreases
2. Increases
3. Remain same
4. Decreases linearly

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