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Chemical Engineering Thermodynamics

Chemical Engineering Thermodynamics
The work done in isothermal compression compared to that in adiabatic compression will be

Less
More or less depending upon the extent of work done
More
Same

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Chemical Engineering Thermodynamics
The entropy change in a reversible isothermal process, when an ideal gas expands to four times its initial volume is

Cv loge 4
R loge 4
R log10 4
Cv log10 4

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Chemical Engineering Thermodynamics
If the pressure on 100 c.c. of air is halved, then its volume (at the same temperature) would be __________ c.c.

200
100
50
205

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Chemical Engineering Thermodynamics
During a reversible isothermal expansion of an ideal gas, the entropy change is

+ve
∞
-ve

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Chemical Engineering Thermodynamics
The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is

Less pronounced
Equal
More pronounced
Data insufficient, can't be predicted

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

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

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