Chemistry - Chemical Equilibrium Question with Solution | TestHub

ChemistryChemical EquilibriumEffect of temperatureMedium2 minQB

ChemistryMediummultiple choice

For the system at equilibrium which of the following statement(s) is/are correct?

Answer:

A, C

Solution:

$Δ G^{\circ} = Δ H^{\circ} - T Δ S^{\circ}$

$Δ G^{\circ} = - 2.303 RT lo g K$

$T Δ S^{^{\circ}} - Δ H^{\circ} = 2.303 RT lo g K$

$\frac{T Δ S ^{^{\circ}} - Δ H ^{\circ}}{2.303 RT} = lo g K$

$\frac{1}{2.303 R} [Δ S^{^{\circ}} - \frac{Δ H ^{\circ}}{T}] = lo g K$

Hence, choice (a) is correct.

On changing temperature, $K$ changes.

Also,

$lo g \frac{K _{2}}{K _{1}} = \frac{Δ H}{2.303 R} (\frac{T _{2} - T _{1}}{T _{1} . T _{2}})$

For endothermic reactions, increasing $T$ increases $K$ , which in turn increases the concentration of products.

Thus, choice (c) is correct, while (b) and (d) are not correct.

Stream:JEESubject:ChemistryTopic:Chemical EquilibriumSubtopic:Effect of temperature

⏱ 2mℹ️ Source: QB

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