What is the value of the Gibbs energy change, \( \Delta G \), in \( kJ~mol^{-1} \) for the reaction between hydrogen and iodine gases at \( 30^{\circ}C \)?
\( H_{2}(g)+I_{2}(g)\rightleftharpoons 2HI(g) \)
\( \Delta G=-RT~lnK \)
\( K=40.2 \)
\( R=8.31~JK^{-1}mol^{-1} \)