Chemical Engineering Thermodynamics - Section 1 (3)

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Chemical Engineering Thermodynamics - Section 1

Fuels and Combustion is a field and there are problems available to
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17.

Boyle's law for gases states that

A.	when temperature is constant.
B.	when temperature & mass of the gas remain constant.
C.	at constant temperature & mass of the gas.
D.	= constant, for any gas.

Answer: Option B

Explanation:

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18.

Joule-Thomson experiment is

A.	isobaric
B.	adiabatic
C.	isenthalpic
D.	both(b) & (c)

Answer: Option D

Explanation:

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19.

Pick out the wrong statement pertaining to the decomposition of PCl₅ represented by, PCl₅ PCl₃ + Cl₂.Degree of dissociation of PCl₅ will

A.	decrease on addition of Cl 2.
B.	increase on addition of an inert gas at constant pressure.
C.	decrease on increasing the pressure of the system.
D.	none of these

Answer: Option D

Explanation:

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20.

Linde gas liquefaction process employs cooling

A.	by throttling
B.	by expansion in an engine
C.	at constant pressure
D.	none of these

Answer: Option A

Explanation:

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21.

"Law of corresponding states" says that

A.	, two different gases behave similarly, if their reduced properties (i.e. P, V and T) are same.
B.	the surface of separation (i. e. the meniscus) between liquid and vapour phase disappears at the critical temperature.
C.	no gas can be liquified above the critical temperature, howsoever high the pressure may be.
D.	the molar heat of energy of gas at constant volume should be nearly constant (about 3 calories).

Answer: Option A

Explanation:

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22.

Degress of freedom at triple point will be

A.	0
B.	1
C.	2
D.	3

Answer: Option A

Explanation:

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23.

The accentric factor of a materical, 'ω', is defined as ω = -log₁₀(P_r^sat)T_r^-1 = 0.7, where, P_r^sat = reduced vapor pressure, T_r = reduced temperature. The value of accentric factor is always

A.	> 2
B.	< 1
C.	> 1
D.	< 3

Answer: Option B

Explanation:

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24.

During Joule-Thomson expansion of gases

A.	enthalpy remains constant.
B.	entropy remains constant.
C.	temperature remains constant.
D.	none of these.

Answer: Option A

Explanation:

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Chemical Engineering Thermodynamics - Section 1 (3)

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