$A$ 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

What is the free energy change $\Delta G$ when $1.0 \ mole$ of water at $100 \ ^oC$ and $1 \ atm$ pressure is converted into steam at $100 \ ^oC$ and $1 \ atm$ pressure?

For the reaction at $298 \ K$,$2 \ A^{+}B \rightarrow C$. $\Delta H = 400 \ kJ \ mol^{-1}$ and $\Delta S = 0.2 \ kJ \ mol^{-1} \ K^{-1}$. The reaction will become spontaneous above $...... \ K$.

An enthalpy diagram for a particular reaction is given in the figure. Is it possible to decide the spontaneity of a reaction from the given diagram? Explain.

Which of the following processes will never be a spontaneous process?

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?

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