A process is carried out at constant pressure. It is found that the entropy change is 0.832 \(\mathrm{kJ} / \mathrm{kg}-\mathrm{K}\). If \(C_{P}=0.846 \mathrm{~kJ} / \mathrm{kg}-\mathrm{K}\) and the upper temperature of the process is \(315^{\circ} \mathrm{C}\), then determine the lower temperature of the process.