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Chemical Engineering Thermodynamics

Chemical Engineering Thermodynamics
Normal temperature and pressure (N.T.P.) corresponds to

0°C and 1 kgf/cm²
20°C and 760 mm Hg
15°C and 760 mm Hg
0°C and 760 mm Hg

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Chemical Engineering Thermodynamics
Mollier diagram is a plot of

Temperature vs. enthalpy
Temperature vs. enthalpy
Entropy vs. enthalpy
Temperature vs. internal energy

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Chemical Engineering Thermodynamics
The change in Gibbs freee energy for vaporisation of a pure substance is

Negative
Positive
Zero
May be positive or negative

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Chemical Engineering Thermodynamics
The free energy change for a chemical reaction is given by (where, K = equilibrium constant)

T lnK
RT lnK
-RT lnK
-R lnK

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Chemical Engineering Thermodynamics
Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ____with the increase of reduced temperature.

Decreases
Increases
Remains constant
Decreases logarithmically

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Chemical Engineering Thermodynamics
At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by(where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.)

μ°+ R lnf
μ° + RT ln f
μ° + T lnf
μ° + R/T lnf

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