Question: Internal energy of an element at 1 atm and 25° C is __________ kcal/kg.mole.
[A].0
273
25
none of these
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
During adiabatic expansion of gas
Question: During adiabatic expansion of gas
[A].pressure remains constant.
pressure is increased.
temperature remains constant.
none of these.
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
“When a gas is expanded from high pressure region to low pressure region ; temper -ature change occurs”. This phenomenon is related to the
Question: “When a gas is expanded from high pressure region to low pressure region ; temper -ature change occurs”. This phenomenon is related to the
[A].Gibbs-Duhem equation
Gibbs-Helmholtz equation
Third law of thermodynamics
Joule-Thomson effect
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
If heat contents of CH4, C2H4 and C3H8 are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH4(g) + C2H4(g) C3H8(g) will be __________ Kcal.
Question: If heat contents of CH4, C2H4 and C3H8 are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH4(g) + C2H4(g) C3H8(g) will be __________ Kcal.
[A].-19.4
-30.2
55.2
-55.2
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
“Law of corresponding states” says that
Question: “Law of corresponding states” says that
[A]., two different gases behave similarly, if their reduced properties (i.e. P, V and T) are same.
the surface of separation (i. e. the meniscus) between liquid and vapour phase disappears at the critical temperature.
no gas can be liquified above the critical temperature, howsoever high the pressure may be.
the molar heat of energy of gas at constant volume should be nearly constant (about 3 calories).
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
In polytropic process (PVn = constant), if n = 1; it means a/an __________ process.
Question: In polytropic process (PVn = constant), if n = 1; it means a/an __________ process.
[A].adiabatic
reversible
isothermal
none of these
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
In case of a close thermodynamic system, there is __________ across the boundaries.
Question: In case of a close thermodynamic system, there is __________ across the boundaries.
[A].no heat and mass transfer
no mass transfer but heat transfer
mass and energy transfer
none of these
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Work done in case of free expansion is
Question: Work done in case of free expansion is
[A].indeterminate
zero
negative
none of these
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Critical temperature is defined as the temperature above which a gas will
Question: Critical temperature is defined as the temperature above which a gas will
[A].not liquify (barring exceptions).
immediately liquify.
never liquify however high the pressure may be.
none of these.
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
Entropy change in case of reversible adiabatic process is
Question: Entropy change in case of reversible adiabatic process is
[A].minimum
zero
maximum
indeterminate
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.