The work done in ergs for the reversible expansion of one mole of an ideal gas from a volume of 10 litres to 20 litres at 25 ° C is

298 × 10 7 × 8 . 31 × 2 . 303 log 2 .

2 . 303 × 298 × 0 . 082 log 2 .

2 . 303 × 298 × 0 . 082 log 0 . 5 .

8 . 31 × 10 7 × 298 × 2 . 303 log 0 . 5 .

E M B I B E

Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 4>Q 67

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Earn 100

Three moles of an ideal gas expanded spontaneously into vacuum. The work done will be:

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Important Questions on Thermodynamics

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 4>Q 68

For vaporization of water at

1

atmospheric pressure, the values of

ΔH

and

ΔS

are

40.63

{kJmol}^{- 1}

and

108.8 {JK}^{- 1} {mol}^{- 1},

respectively. The temperature when Gibbs energy change

(ΔG)

for this transformation will be zero, is:

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 4>Q 69

The following two reactions are known: ${Fe}_{2} {O_{3}}_{(s)} + 3 {CO}_{(g)} \to 2 {Fe}_{(s)} + 3 {CO}_{2}_{(g)}; ∆ H = - 26.8 kJ$ and ${FeO}_{(s)} + {CO}_{(g)} \to {Fe}_{(s)} + {CO}_{2}_{(g)}; ∆ H = - 16.5 kJ$ . The value of $∆ H$ for the following reaction ${Fe}_{2} {O_{3}}_{(s)} + {CO}_{(g)} \to 2 {FeO}_{(s)} + {CO}_{2}_{(g)}$ is

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 4>Q 70

Standard entropies of

X_{2}, Y_{2}

and

{XY}_{3}

are

60, 40 and 50 J K^{- 1} {mol}^{- 1}

respectively. For the reaction

\frac{1}{2} X_{2} + \frac{3}{2} Y_{2} ⇌ {XY}_{3}, ∆ H = - 30 KJ

to be at equilibrium, the temperature should be

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 4>Q 71

Consider the following processes:

$\begin{matrix} ∆ H (kJ / mol) \\ 1 / 2 A \to B & + 150 \\ 3 B \to 2 C + D & - 125 \\ E + A \to 2 D & + 350 \end{matrix}$

For $B + D \to E + 2 C, Δ H$ will be:

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 4>Q 72

If the enthalpy change for the transition of liquid water to steam is

30 kJ {mol}^{- 1}

at

27 ° C

, the entropy change for the process would be

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 4>Q 73

Enthalpy change for the reaction,

4 H_{(g)} ⟶ 2 H_{2 (g)}

is

- 869.6 kJ

The dissociation energy of

H - H

bond is:

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 4>Q 74

Which of the following is correct option for free expansion of an ideal gas under adiabatic condition?

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 4>Q 75

Equal volumes of two monatomic gases, A and B, at same temperature and pressure are mixed. The ratio of specific heats (C_p/C_v) of the mixture will be:

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