Question

Determine whether the following reaction will be spontaneous or nonspontaneous under standard conditions. Zn (s) +Cu²⁺ (aq) → Zn²⁺ (aq) + Cu (s) ΔH° = -219 kJ, ΔS° = -21 J K⁻¹ . (Spontaneous)

Answer 1

Explanation:

Spontaneous process is the process in which energy is released from the system and system goes towards the stability,while non-spontaneous process is that in which energy is given to the system.

$\Delta G = \Delta H^{0}-T\Delta S$

When $\Delta G$ is negative then process is spontaneous.

Since $\Delta H^{0}$ and $\Delta S$ is negative.SO,at low temperature the process is spontaneous while at high temperature it is non-spontaneous.