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Chemical Engineering Thermodynamics

Chemical Engineering Thermodynamics
When a system is in equilibrium for all possible processes, the differential or finite change of entropy is

< 0
None of these
= 0
> 0

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Chemical Engineering Thermodynamics
The reaction A (l) R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The number of degrees of freedom are

1
3
2

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Chemical Engineering Thermodynamics
The theoretical minimum work required to separate one mole of a liquid mixture at 1 atm, containing 50 mole % each of n- heptane and n- octane into pure compounds each at 1 atm is

2 RT
-RT ln 0.5
0.5 RT
-2 RT ln 0.5

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Chemical Engineering Thermodynamics
1st law of thermodynamics is nothing but the law of conservation of

None of these
Energy
Mass
Momentum

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Chemical Engineering Thermodynamics
The partial pressure of each constituent present in an alloy is __________ the total vapor pressure exerted by the alloy.

Less than
More than
Equal to
Either B or C; depends on the type of alloy

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Chemical Engineering Thermodynamics
As the time is passing, entropy of the universe

Is decreasing
Data insufficient, can't be predicted
Is increasing
Remains constant

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