NEET UG CHEMISTRY MCQ: THERMODYNAMICS

1 Hard

1 of 1

Application +4 | -1

The variation of equilibrium constant with temperature is given below:

\begin{array}{cccccccccccccccccccc} {\mathrm{Temperature}}&{\mathrm{Equilibrium\,\, constant}}\\ {{T_1} = {{25}^ \circ }C}&{{K_1} = 10}\\ {{T_2} = {{100}^ \circ }C}&{{K_2} = 100} \end{array}

The values of

\Delta \mathrm{H}^\circ ,\Delta \mathrm{G}^\circ \,\,\,\,\mathrm{at }\,\,{\mathrm{T}_\mathrm{1}}\mathrm{ }\,\mathrm{and}\,\,\mathrm{ }\Delta G^\circ \,\,\mathrm{ at}\,\,\mathrm{ }{\mathrm{T}_2}\mathrm{ }\,\,\mathrm{(in}\,\,\mathrm{ kJ}\,\,\mathrm{ mo}{\mathrm{l}^{ - 1}})

respectively, are close to [Use

R\mathrm{ } = \mathrm{ }8.314\mathrm{ }J{K^{ - 1}}mo{l^{ - 1}}]

View answer and explanation

Correct option: C

28.4, -5.71 and -14.29

Option C (28.4, -5.71 and -14.29) is correct because it accurately calculates

\Delta H^\circ

using the van't Hoff equation and

\Delta G^\circ

at both temperatures using

\Delta G^\circ = -RT\ln K

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