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Chemical Engineering Thermodynamics

Chemical Engineering Thermodynamics
The enthalpy change when ammonia gas is dissolved in water is called the heat of

Solution
Dilution
Formation
Combustion

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Chemical Engineering Thermodynamics
At normal boiling point, molar entropy of vaporisation is __________ Joule/K°.mole.

142
192
92
72

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Chemical Engineering Thermodynamics
Gibbs free energy of a pure fluid approaches __________ as the pressure tends to zero at constant temperature.

Zero
None of these
Minus infinity
Infinity

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Chemical Engineering Thermodynamics
For a real gas, the chemical potential is given by

R dlnf
RT dlnf
None of these
RT dlnP

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Chemical Engineering Thermodynamics
An ideal liquid refrigerant should

Have low specific heat
Both A and B
Not have a subatmospheric vapour pressure at the temperature in the refrigerator coils
Not have unduly high vapour pressure at the condenser temperature

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Chemical Engineering Thermodynamics
The expression for entropy change given by, ΔS = - nR ln (P₂/P₁), holds good for

Cooling of a real gas
Heating of an ideal gas
Expansion of a real gas
Reversible isothermal volume change

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