$A$ process will be spontaneous at all temperatures if

  • A
    $\Delta H < 0$ and $\Delta S < 0$
  • B
    $\Delta H < 0$ and $\Delta S > 0$
  • C
    $\Delta H > 0$ and $\Delta S > 0$
  • D
    $\Delta H > 0$ and $\Delta S < 0$

Explore More

Similar Questions

Gibbs free energy $G$,enthalpy $H$ and entropy $S$ are interrelated as in

For $2 \ mol$ of $He$ (ideal gas),find the work done in a process where it is heated from $200 \ K$ to $400 \ K$ such that the enthalpy of the gas varies as : $H = 10 \ V^2$ (in $R$)

Difficult
View Solution

Which of the following statements is correct?

The entropy and enthalpy changes for the reaction $CO_{(g)} + H_2O_{(g)} \rightleftharpoons CO_{2(g)} + H_{2(g)}$ at $300 \ K$ and $1 \ atm$ are respectively $-42.4 \ J \ K^{-1}$ and $-41.2 \ kJ$. The temperature at which the reaction will go in the reverse direction is (in $K$)

For a reaction to be spontaneous at all temperatures, the values of enthalpy change $\Delta H$ and entropy change $\Delta S$ should be:

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo