Chemical Engineering - Stoichiometry

1. 

No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules

A. collide without loss of energy.
B. do work equal to loss in kinetic energy.
C. are above the inversion temperature.
D. exert no attractive force on each other.

Answer: Option C

Explanation:

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2. 

With increase in the solute concentration, the specific heat of aqueous solutions

A. increases
B. decreases
C. remains unchanged
D. either (a) or (b); depends on the type of solution

Answer: Option B

Explanation:

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3. 

The heat capacity of a substance is

A. greater for liquid state than for solid state.
B. lower for liquid state than for gaseous state.
C. higher for solid state than for liquid state.
D. equal for solid and liquid states below melting point.

Answer: Option A

Explanation:

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4. 

The heat of solution depends upon the

A. nature of solvent
B. concentration of solution
C. nature of solute
D. all (a), (b) & (c)

Answer: Option D

Explanation:

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5. 

The molar composition of a gas is 10% H2, 10% O2, 30% CO2 and balance H2O. If 50% H2O condenses, the final mole percent of H2 in the gas on a dry basis will be

A. 10%
B. 5%
C. 18.18%
D. 20%

Answer: Option D

Explanation:

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