$A$ reaction at $1 \ bar$ is non-spontaneous at low temperature but becomes spontaneous at high temperature. Identify the correct statement about the reaction among the following:

  • A
    $\Delta H$ is positive and $\Delta S$ is positive
  • B
    $\Delta H$ is negative and $\Delta S$ is negative
  • C
    $\Delta H$ is positive and $\Delta S$ is negative
  • D
    $\Delta H$ is negative and $\Delta S$ is positive

Explore More

Similar Questions

For a certain reaction,the enthalpy change and entropy change are $40.63 \ kJ \ mol^{-1}$ and $100 \ J \ K^{-1} \ mol^{-1}$ respectively. What will be the value of $\Delta G$ at $27 \ ^oC$?

The effect of temperature on the spontaneity of reactions is represented as follows:
Condition Details
$A$. $\Delta H: +, \Delta S: -$ $T$: any $T$,Spontaneity: Non-spontaneous
$B$. $\Delta H: +, \Delta S: +$ $T$: low $T$,Spontaneity: Non-spontaneous
$C$. $\Delta H: -, \Delta S: -$ $T$: low $T$,Spontaneity: Spontaneous
$D$. $\Delta H: -, \Delta S: +$ $T$: any $T$,Spontaneity: Spontaneous

Which of the above conditions are correctly matched?

For the vaporization of water at $1 \ atm$ pressure,the values of $\Delta H$ and $\Delta S$ are $40.63 \ kJ/mol$ and $108.8 \ J/K \cdot mol$ respectively. At what temperature $(K)$ will the change in Gibbs energy $(\Delta G)$ be zero (in $.4$)?

The essential condition for the feasibility of a reaction is that

Which of the following pairs of a chemical reaction is certain to result in a spontaneous reaction?

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