Alpha Question Bank for Engineering: Chemistry>Chapter 4 - Thermodynamics>Exercise-4>Q 31

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Calculate the free energy change at $298 K$ for the reaction; ${Br}_{2} (l) + {Cl}_{2} (g) ⟶ 2 BrCl (g) .$ For the reaction $ΔH ° = 29.3 kJ &$ the entropies of ${Br}_{2} (l), {Cl}_{2} (g) & BrCl (g)$ at $298 K$ are $152.3, 223.0, 239.7 J$ ${mol}^{- 1} K^{- 1}$ respectively.

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Important Questions on Thermodynamics

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Alpha Question Bank for Engineering: Chemistry>Chapter 4 - Thermodynamics>Exercise-4>Q 32

One gram sample of oxygen undergoes free expansion in insulated container from

0.75 L

to

3.0 L

at

298 K .

Calculate

Δ S,

q, w, ΔH

and

Δ E

.

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Alpha Question Bank for Engineering: Chemistry>Chapter 4 - Thermodynamics>Exercise-4>Q 34

Calculate

Δ_{r} G °

for

({NH}_{4} Cl, s)

at

310 K

Given:

Δ_{f} H ° ({NH}_{4} Cl s) = - 314.5 kJ / mol; Δ_{r} C_{p} = 0

S ° = N_{2} (9) 192 {JK}^{- 1} {mol}^{- 1}

S ° H_{2} (9) = 130.5 {JK}^{- 1} {mol}^{- 1}

S ° c_{12} (g) = 233 {JK}^{- 1} {mol}^{- 1}

S^{0} {NH}_{t}, c (s) = 99.5 {JK}^{- 1} {mol}_{i}^{- 1}

All given data are at

300 K

.

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Alpha Question Bank for Engineering: Chemistry>Chapter 4 - Thermodynamics>Exercise-4>Q 37

An isothermal process is associated with:

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Alpha Question Bank for Engineering: Chemistry>Chapter 4 - Thermodynamics>Exercise-4>Q 39

When a solid melts, there is:

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Alpha Question Bank for Engineering: Chemistry>Chapter 4 - Thermodynamics>Exercise-4>Q 42

An isobaric process is associated with:

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Alpha Question Bank for Engineering: Chemistry>Chapter 4 - Thermodynamics>Exercise-4>Q 43

Lattice energy of ionic compound is calculated by using:

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Alpha Question Bank for Engineering: Chemistry>Chapter 4 - Thermodynamics>Exercise-4>Q 44

According to second law of thermodynamics, ________.

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Alpha Question Bank for Engineering: Chemistry>Chapter 4 - Thermodynamics>Exercise-4>Q 47

The entropy change for the fusion of ice at

0 ° C

(molar latent heat of fusion of ice

= 6.025 {kJmol}^{- 1}

) is: