Which of the following graphs correctly represents the variation of thermodynamic properties of Haber's process?
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The Correct Option is A
Solution and Explanation
$-\Delta H^\theta/T$ is therefore positive and falls towards zero as $T$ increases, and $-\Delta G^\theta/T = -\Delta H^\theta/T + \Delta S^\theta$ starts positive, falls below $-\Delta H^\theta/T$ and crosses zero (at the temperature where $\Delta G^\theta = 0$), becoming negative.
Only graph (1) shows these trends together with a negative, nearly constant $\Delta H^\theta$ and $\Delta S^\theta$: option (1).
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