What is the ${}_{r}G$ for the following reaction $($in $kJmo{l}^{-1})$ at $298K?$

$2S{i}_{(s)}+3H_{2(g)}S{i}_2{H}_{6(g)}$

The conditions for this reaction are:

$P_{H2}=0\mathrm{.}56$ bar

$P_{Si2H6}=1\mathrm{.}65$ bar

You will also need to use Appendix II in your textbook $($containing standard Gibbs energies of formation$).$ A copy of Appendix II has also been posted on eClass.

Please use the method of Gibbs energy of formation to calculate $rG$ if needed.

For partial credit, enter the value of $"$Q$"$ for this reaction.