Chemical Engineering Thermodynamics - Section 1 (2)

Directions to Solve

Chemical Engineering Thermodynamics - Section 1

Fuels and Combustion is a field and there are problems available to
solve in this category. You will find the MCQs and can solve them easily.

9.

The expression, 421-427-1 , gives the free energy change

A.	with pressure changes at constant temperature.
B.	under reversible isothermal volume change.
C.	during heating of an ideal gas.
D.	during cooling of an ideal gas.

Answer: Option A

Explanation:

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10.

Equilibrium constant decreases as the temperature

A.	increases, for an exothermic reaction.
B.	decreases, for an exothermic reaction.
C.	increases, for an endothermic reaction.
D.	none of these.

Answer: Option A

Explanation:

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11.

Which of the following is a thermodynamic property of a system ?

A.	Concentration
B.	Mass
C.	Temperature
D.	Entropy

Answer: Option D

Explanation:

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12.

In any spontaneous process,

A.	only F decreases
B.	only A decreases
C.	both F and A decreases
D.	both F and A increase

Answer: Option C

Explanation:

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13.

Pick out the correct statement:

A.	In an isothermal system, irreversible work is more than reversible work.
B.	Under reversible conditions, the adiabatic work is less than isothermal work.
C.	Heat, work, enthalpy and entropy are all 'state functions'.
D.	Matter and energy can not be exchanged with the surroundings in a closed system.

Answer: Option B

Explanation:

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14.

Out of the following refrigeration cycles, which one has maximum COP ?

A.	Air cycle
B.	Carnot cycle
C.	Ordinary vapor compression cycle
D.	Vapor compression with a reversible expansion engine

Answer: Option B

Explanation:

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15.

In a reversible chemical reaction (where, Δx = number of moles of products-number of moles of reactants )

A.	addition of inert gas favours the forward reaction, when Δx is positive.
B.	pressure has no effect on equilibrium, when Δn = 0.
C.	addition of inert gas has no effect on the equilibrium constant at constant volume for any value of Δx (+ ve, - ve) or zero).
D.	all 'a', 'b' & 'c'.

Answer: Option D

Explanation:

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16.

1st law of thermodynamics is nothing but the law of conservation of

A.	momentum
B.	mass
C.	energy
D.	none of these

Answer: Option C

Explanation:

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