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Chemical Engineering Thermodynamics

Chemical Engineering Thermodynamics
For a cyclic process, a fixed ratio between heat and work

Always exists
Is difficult to predict
May exist
Never exists

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Chemical Engineering Thermodynamics
Out of the following refrigeration cycles, which one has maximum COP?

Ordinary vapor compression cycle
Air cycle
Carnot cycle
Vapor compression with a reversible expansion engine

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Chemical Engineering Thermodynamics
Heat of formation of an element in its standard state is

< 0
A function of pressure
> 0

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Chemical Engineering Thermodynamics
Isentropic process means a constant __________ process.

Entropy
Enthalpy
None of these
Pressure

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Chemical Engineering Thermodynamics
A nozzle is a device, which

Reduces kinetic energy and increases pressure
Reduces both kinetic energy and pressure
Increases both kinetic energy and pressure
Increases kinetic energy and decreases pressure

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Chemical Engineering Thermodynamics
The value of gas constant 'R' is

1.987 cal/gm mole °K
1.987 BTU/lb. mole °R
Both A and B
Neither A nor B

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