Chemical Thermodynamics — Chemistry STD 12 Science — Question
Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryChemical Thermodynamics2 Marks
Question
Obtain a temperature condition for equilibrium.
✓
Answer
For a system at equilibrium, free energy change $\Delta G$ is, $\Delta G=\Delta H-T \Delta S$ where $\Delta H$ is enthalpy change, $\Delta S$ is entropy change at temperature, $T$. Since $\Delta G=0$ at equilibrium, $\begin{aligned} & O =\Delta H - T \Delta S \\ & \therefore T \Delta S =\Delta H \\ & ORT =\frac{\Delta H}{\Delta S} \end{aligned}$ Hence at temperature T, changeover between forward spontaneous step and backward nonspontaneous step occurs and the system attains an equilibrium. Here $\Delta H$ and $\Delta S$ are assumed to be independent of temperature.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.