Question

For a non-spontaneous reaction at all temperatures the correct set of thermodynamic parameter is

• A. $\Delta H=-ve$
  $\Delta S=+ve$
• B. $\Delta H=+ve$
  $\Delta S=-ve$
• C. $\Delta H=+ve$
  $\Delta S=+ve$
• D. $\Delta H=-ve$
  $\Delta S=-ve$

Answer 1

The correct option is B $\Delta H=+ve$

$\Delta S=-ve$
Answer (3)
If $\Delta H=+ve$ and $\Delta S=-ve$, then $\Delta G=+ve$ always. So always non-spontaneous.