Chemical Engineering Thermodynamics - Chemical Engineering Questions and Answers

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The most important application of distribution law is in

evaporation

liquid extraction

drying

distillation

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Pick out the correct statement.

Entropy and enthalpy are path functions.

In a closed system, the energy can be exchanged with the surrounding, while. matter can not be exchanged.

All the natural processes are reversible in nature.

Work is a state function.

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Air-refrigeration cycle

is the most efficient of all refrigeration cycles.

has very low efficiency.

requires relatively large quantities of air to achieve a significant amount of refrigeration.

both (b) and (c).

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In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respetively, the Carnot COP will be

5.2

6.2

0.168

data insufficient, can't be found out

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The compressibility factor for an ideal gas is 1. Its value for any other real gas is

< 1

> 1

either (b) or (c), depends on the nature of the gas

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If two gases have same reduced temperature and reduced pressure, then they will have the same

volume

mass

critical temperature

none of these

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Which of the following is an extensive property of a system ?

Heat capacity

Molal heat capacity

Pressure

Concentration

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C_p - C_v = R is valid for __________ gases.

ideal

all

very high pressure

very low temperature

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At a given temperature, the volume of a gas dissolved in a solvent __________ with increase in pressure.

increases

decreases

remains unchanged

may increase or decrease; depends on the gas