Chemical Engineering - Stoichiometry

1. 

One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH4 + 2O2 → CO2 + 2H2O. Both the reactants and products are in gas phase. ΔH°298 = - 730 kJ/mole of methane. Mole fraction of water vapour in the product gases is about

A. 0.19
B. 0.33
C. 0.40
D. 0.67

Answer: Option A

Explanation:

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2. 

Volume percent for gases is equal to the

A. weight percent.
B. mole percent.
C. weight percent only for ideal gases.
D. mole percent only for ideal gases.

Answer: Option D

Explanation:

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3. 

Compressibility factor of a real gas is the ratio of the actual volume to that predicted by ideal gas law. As the pressure of the gas approaches zero, the compressibility factor approaches

A.
B. 0
C. 1
D. 0.24

Answer: Option C

Explanation:

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4. 

Cp equals Cv at

A. 0°C
B. 0°K
C. 0°F
D. 0°R

Answer: Option B

Explanation:

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5. 

Pick out the wrong statement.

A. The evaporation of aqueous solution of glucose causes its molarity to increase.
B. Both the freezing point as well as boiling point of sea water is more than that of distilled water.
C. The solution containing equal masses of two liquids 'X' and 'Y' has the same mole fraction of' 'X' and 'Y'.
D. both (b) and (c)

Answer: Option D

Explanation:

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