Chemical Engineering Thermodynamics

161. For an isothermal process, the internal energy of a gas

1. Increases
2. Decreases
3. Remains unchanged
4. Data insufficient, can't be predicted

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162. For an isothermal reversible compression of an ideal gas

1. Only ΔE = 0
2. Only ΔH =0
3. ΔE = ΔH = 0
4. dQ = dE

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163. For any system, what is the minimum number of degrees of freedom?

1. 0
2. 1
3. 2
4. 3

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164. For equilibrium process (i.e. reversible) in an isolated system

1. ds = 0
2. ds < 0
3. ds > 0
4. ds = Constant

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165. For multi-component multiple phases to be in equilibrium at the same pressure and temperature, the _________ of each component must be same in all phases.

1. Chemical potential
2. Fugacity
3. Both (A) and (B)
4. Neither (A) nor (B)

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166. For organic compounds, group contribution method can be used for the estimation of

1. Critical properties
2. Specific gravity
3. Specific volume
4. Thermal conductivity

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167. For spontaneous changes in an isolated system (S = entropy)

1. ds = 0
2. ds <0
3. ds > 0
4. ds = Constant

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168. For the gaseous phase chemical reaction, C2H4(g) + H₂O(g) ↔ C2H5OH(g), the equilibrium conversion does not depend on the

1. Steam to ethylene ratio
2. Temperature
3. Pressure
4. None of these

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169. For the reversible exothermic reaction, N₂ + 3H₂ ⇌ 2NH₃, increase of pressure would

1. Shift the equilibrium towards right
2. Give higher yield of NH3
3. Both (B) and (C)
4. Neither (A) nor (B)

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170. For water at 300°C, it has a vapour pressure 8592.7 kPa and fugacity 6738.9 kPa Under these conditions, one mole of water in liquid phase has a volume of 25.28 cm³ and that in vapour'phase in 391.1 cm³.Fugacity of water (in kPa) at 9000 kPa will be

1. 6738.9
2. 6753.5
3. 7058.3
4. 9000

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