Chemical Engineering Thermodynamics

221. If two pure liquid constituents are mixed in any proportion to give an ideal solution, there is no change in

1. Volume
2. Enthalpy
3. Both (A) & (B)
4. Neither (A) nor (B)

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222. If we increase the pressure on a substance (which is at its triple point), then the triple point

1. Increases
2. Decreases
3. Remains unchanged
4. May increase or decrease; depends on the substance

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223. In a homogeneous solution, the activity co-efficient of a component depends upon the

1. Pressure
2. Composition
3. Temperature
4. All (A), (B) and (C)

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224. In a homogeneous solution, the fugacity of a component depends upon the

1. Pressure
2. Composition
3. Temperature
4. All (A), (B) and (C)

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225. In a P-V diagram (for an ideal gas), an isothermal curve will coincide within adiabatic curve (through a point), when

1. C_p < C_v
2. C_p = C_v
3. C_p > C_v
4. C ≥ C_v

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226. In a reversible chemical reaction (where, Δx = number of moles of products-number of moles of reactants)

1. Addition of inert gas favours the forward reaction, when Δx is positive
2. Pressure has no effect on equilibrium, when Δn = 0
3. Addition of inert gas has no effect on the equilibrium constant at constant volume for any value of Δx (+ ve, - ve) or zero)
4. All 'a', 'b' & 'c'

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227. In a reversible process

1. Tds = dE + dW
2. dE - dW = Tds
3. dW - dE = Tds
4. Tds - dW + dE >0

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228. In a turbine, the fluid expands almost

1. Isothermally
2. Isobarically
3. Adiabatically
4. None of these

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229. In a working refrigerator, the value of COP is always

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

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230. In an ideal gas mixture, fugacity of a species is equal to its

1. Vapor pressure
2. Partial pressure
3. Chemical potential
4. None of these

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