What is an example of a non-spontaneous process practice problem?

In a spontaneous process, a reaction happens on its own without the aid of a catalyst; in a non-spontaneous reaction, a catalyst is required for the reaction to occur.

A piece of paper turning yellow over time is an example of a spontaneous reaction, whereas lighting a piece of wood on fire is an example of a non-spontaneous reaction.

Calculating spontaneity can be done using

Alpha G^\circ = Alpha H^\circ - T\Delta S^\circ

Enthalpy change is represented by delta H, and entropy change is represented by T delta S.

Whereas Delta G = 0 indicates equilibrium, Delta G > 0 indicates non-spontaneous reaction.

Try applying the above formula to this problem.

The balanced equation below describes how methane gas reacts with water vapor to create a mixture of carbon monoxide and hydrogen.

\rightarrow \text{CO}(g)+3\text{H}_2(g)=\text{CH}_4(g)+\text{H}_2\text{O}(g)

Determine whether the reaction is spontaneous at 25°C by calculating the \Delta G^\circ. The reaction's \Delta H^\circ is +206.1 kJ/mol, while its \Delta S^\circ is +215 J/K • mol.

As soon as you find the solution, I'll comment!

An example of a non-spontaneous process practice problem is the decomposition of water into hydrogen and oxygen gas in the absence of an external energy source.