Chemical Engineering Thermodynamics

81. Chemical engineering thermodynamics is concerned with the _________ in/of chemical processes.

1. Reaction mechanism
2. Calculation of rates
3. Energy transformation from one form to another
4. None of these

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82. Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The ratio of chemical potential to free energy of a pure substance at constant temperature and pressure is

1. 0
2. 1
3. ∞
4. None of these

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83. Chemical potential is a/an

1. Extensive property
2. Intensive property
3. Force which drives the chemical system to equilibrium
4. Both (B) and (C)

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84. Chemical potential of ith component of a system is given by

1. μ_i = (∂F/∂n_i)_{T, P, ni}
2. μ_i = (∂A/∂n_i)_{T, P, ni}
3. μ_i = (∂F/∂n_i)_{T, P}
4. μ_i = (∂A/∂n_i)_{T, P,}

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85. Choose the condition that must be specified in order to liquify CO₂ (triple point for CO₂ is - 57°C and 5.2 atm).

1. Pressure must be kept below 5.2 atm
2. Temperature must be kept above - 57°C
3. Pressure must be kept below 5.2 atm. and temperature must be kept above 57°C
4. Pressure and temperature must be kept below 5.2 atm. and - 57°C respectively

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86. Clapeyron Equation deals with the

1. Rate of change of vapour pressure with temperature
2. Effect of an inert gas on vapour pressure
3. Calculation of ΔF for spontaneous phase change
4. Temperature dependence of heat of phase transition

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87. Claude gas liquefaction process employs cooling

1. At constant pressure
2. By throttling
3. By expansion in an engine
4. None of these

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88. Claude's liquefaction process employs the cooling of gases by

1. Expansion in an engine
2. Following a constant pressure cycle
3. Throttling
4. None of these

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89. Clausius-Clapeyron Equation gives accurate result, when the

1. Vapour pressure is relatively low and the temperature does not vary over wide limits
2. Vapour obeys the ideal gas law and the latent heat of vaporisation is constant
3. Volume in the liquid state is negligible compared with that in the vapour state
4. All (A), (B) and (C)

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90. Clausius-Clapeyron equation is applicable to _________ equilibrium processes.

1. Solid-vapor
2. Solid-liquid
3. Liquid-vapor
4. All (A), (B) and (C)

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