At 298 K, Kp for the reaction N_{2}O_{4}(g)\rightleftharpoons 2NO_{2} (g) is 0.98. Predict whether the reaction is spontaneous or not.

Answers (1)

As per the information given in the question, Kp  for the above reaction is 0.98

\Delta _{y}G = \Delta _{y}H- T \Delta _{y}G = -RT\; ln K

For a process to be of spontaneous nature, \Delta G should be negative

As  \Delta_{y} G=-RT\; ln K_{p}

Hence \Delta_{y} G has a negative connotation, and the reaction given is of spontaneous nature

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