Question

The temperature in K at which $\Delta G=0$, for a given reaction with $\Delta H=-20.5kJ{mol}^{-1}$ and $\Delta S=-50.0J{K}^{-1}{mol}^{-1}$ is:

• A. -410
• B. 410
• C. 2.44
• D. -2.44

Answer 1

The correct option is B 410

Given that,

$\Delta H=-20.5kJ/mol=-20500J/mol$

$\Delta S=-50J{K}^{-1}mo{l}^{-1}$

Now,

$\Delta G=\Delta H-T\Delta S$

$0=-20500-T(-50.0)$

$20500=50T$

$\Rightarrow T=410K$