$(I)\,\,q + \mathrm{w}$ $(II)\,\, q$
$(III)\,\, \mathrm{w}$ $(IV)\,\, H - TS$
\(\Delta G=\Delta H-T \Delta S\)
\(\Delta U\) and \(\Delta G\) are state functions but \(q\) and w are not state functions.
${H_2}C = C{H_2}(g) + {H_2}(g) \to {H_3}C - C{H_3}(g)$