If $100 \; mole$ of $ H_2O_2$ decompose at $1 \; bar$ and $300 K,$ the work done $(kJ)$ by one mole of $O_2(g)$ as it expands against 1 bar pressure is:

Question

$\begin{array}{1 1}(1) 62.25\\ (2) 124.50\\ (3) 249.00 \\(4) 498.00 \end{array} $