Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-I (Conceptual Questions)>Q 66

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The entropy of an adiabatic reversible process is:-

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Important Questions on Thermodynamics

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Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-I (Conceptual Questions)>Q 67

If a gas is allowed to expand under reversible adiabatic conditions, then what is zero for such a process?

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Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-I (Conceptual Questions)>Q 68

For reaction at

25^{o} C

enthalpy change

(∆ H)

and entropy change

(∆ S)

are

- 11.7 \times 10^{3} J m o l e^{- 1}

and

- 105 J m o l e^{- 1} K^{- 1}

respectively. The reaction is:

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Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-I (Conceptual Questions)>Q 69

The spontaneous nature of a reaction is impossible if:

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Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-I (Conceptual Questions)>Q 70

If

ΔH > 0

and

ΔS > 0,

the reaction proceeds spontaneously when :-

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Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-I (Conceptual Questions)>Q 71

The temperature at which the reaction ${Ag}_{2} O (s) ⟶ 2 Ag (s) + \frac{1}{2} O_{2} (g)$ is at equilibrium is ....., given, $ΔH = 30.5 kJ {mol}^{- 1}$ and $ΔS = 0.066 kJ K^{- 1} {mol}^{- 1}$ .

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Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-I (Conceptual Questions)>Q 72

The enthalpy change for a given reaction at

298 K

is

- x Cal {mol}^{- 1}

. If the reaction occurs spontaneously at

298 K

, the entropy change at that temperature

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Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-I (Conceptual Questions)>Q 73

Which of the following is true for the reaction

H_{2} O (ℓ) ⇌ H_{2} O (g)

at

100 ° C

and

1

atmosphere

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Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-I (Conceptual Questions)>Q 74

For hypothetical reversible reaction

\frac{1}{2} A_{2} (g) + \frac{3}{2} B_{2} (g) ⇌ {AB}_{3} (g); ΔH = - 20 kJ

, if standard entropies of

A_{2}, B_{2}

and

{AB}_{3}

are

60, 40

and

50 {JK}^{- 1} {mol}^{- 1}

, respectively. The above reaction will be equilibrium at