Chemical Engineering Thermodynamics

191. Gibbs free energy per mole for a pure substance is equal to the

1. Latent heat of vaporisation
2. Chemical potential
3. Molal boiling point
4. Heat capacity

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192. Gibbs phase rule finds application, when heat transfer occurs by

1. Conduction
2. Convection
3. Radiation
4. Condensation

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193. Gibbs-Duhem equation

1. States that n₁dμ₁ + N₂dμ2 + ....n_jdμ_j = 0, for a system of definite composition at constant temperature and pressure
2. Applies only to binary systems
3. Finds no application in gas-liquid equilibria involved in distillation
4. None of these

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194. Gibbs-Duhem equation relates composition in liquid phase and the _________ at constant temperature & pressure.

1. Fugacity
2. Partial pressure
3. Activity co-efficient
4. All (A), (B), and (C)

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195. Gibbs-Helmholtz equation is

1. ΔF = ΔH + T [∂(ΔF)/∂T]P
2. ΔF = ΔH - TΔT
3. d(E - TS) T, V < 0
4. dP/dT = ΔH_vap/T.ΔV_vap

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196. Grams of butane (C₄H₁₀) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be

1. 580
2. 640
3. 1160
4. Data insufficient; can't be computed

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197. Heat evolved/absorbed during conversion of a substance from one allotropic form to another is termed as the heat of

1. Fusion
2. Vaporisation
3. Transition
4. None of these

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198. Heat is added at constant pressure in an ideal _________ cycle.

1. Stirling
2. Brayton
3. Rankine
4. Both (B) and (C)

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199. Heat is added at constant temperature in an ideal _________ cycle.

1. Stirling
2. Brayton
3. Rankine
4. None of these

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200. Heat of formation of an element in its standard state is

1. 0
2. < 0
3. > 0
4. A function of pressure

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