At 60° C, vapour pressure of methanol and water are 84.562 kPa and 19.953 kPa respectively. An aqueous solution of methanol at 60° C exerts a pressure of 39.223 kPa; the liquid phase and vapour phase mole fractions of methanol are 0.1686 and 0.5714 respectively. Activity co-efficient of methanol is

Chemical Engineering Thermodynamics
At 60° C, vapour pressure of methanol and water are 84.562 kPa and 19.953 kPa respectively. An aqueous solution of methanol at 60° C exerts a pressure of 39.223 kPa; the liquid phase and vapour phase mole fractions of methanol are 0.1686 and 0.5714 respectively. Activity co-efficient of methanol is

1.9398

1.572

4.238

3.389

1.9398

1.572

4.238

3.389

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Chemical Engineering Thermodynamics
Third law of thermodynamics is helpful in

Calculating absolute entropies of substances at different temperature

Both B and C

Prediction of the extent of a chemical reaction

Evaluating entropy changes of chemical reaction

Calculating absolute entropies of substances at different temperature

Both B and C

Prediction of the extent of a chemical reaction

Evaluating entropy changes of chemical reaction

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Chemical Engineering Thermodynamics
At the critical point of a substance

There is no distinction between liquid and vapour phases

All of these

Liquid and vapour have the same density

The surface tension vanishes

There is no distinction between liquid and vapour phases

All of these

Liquid and vapour have the same density

The surface tension vanishes

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Chemical Engineering Thermodynamics
The thermodynamic law, PVy = constant, is not applicable in case of

Adiabatic compression of a perfect gas

Ideal compression of air

Free expansion of an ideal gas

Adiabatic expansion of steam in a turbine

Adiabatic compression of a perfect gas

Ideal compression of air

Free expansion of an ideal gas

Adiabatic expansion of steam in a turbine

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Chemical Engineering Thermodynamics
The total change in the enthalpy of a system is independent of the

Pressure and temperature

Number of intermediate chemical reactions involved

None of these

State of combination and aggregation in the beginning and at the end of the reaction

Pressure and temperature

Number of intermediate chemical reactions involved

None of these

State of combination and aggregation in the beginning and at the end of the reaction

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Chemical Engineering Thermodynamics
A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the co-efficient of performance (COP) for a given refrigeration effect?

Vapor compression cycle using expansion valve

Air refrigeration cycle

Carnot refrigeration cycle

Vapor compression cycle using expansion engine

Vapor compression cycle using expansion valve

Air refrigeration cycle

Carnot refrigeration cycle

Vapor compression cycle using expansion engine

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Chemical Engineering Thermodynamics

Chemical Engineering Thermodynamics Third law of thermodynamics is helpful in

Chemical Engineering Thermodynamics At the critical point of a substance

Chemical Engineering Thermodynamics The thermodynamic law, PVy = constant, is not applicable in case of

Chemical Engineering Thermodynamics The total change in the enthalpy of a system is independent of the

Chemical Engineering Thermodynamics A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the co-efficient of performance (COP) for a given refrigeration effect?

Chemical Engineering Thermodynamics
Third law of thermodynamics is helpful in

Chemical Engineering Thermodynamics
At the critical point of a substance

Chemical Engineering Thermodynamics
The thermodynamic law, PVy = constant, is not applicable in case of

Chemical Engineering Thermodynamics
The total change in the enthalpy of a system is independent of the

Chemical Engineering Thermodynamics
A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the co-efficient of performance (COP) for a given refrigeration effect?