$(I)\,\,q + \mathrm{w}$ $(II)\,\, q$
$(III)\,\, \mathrm{w}$ $(IV)\,\, H - TS$
\(\Delta G=\Delta H-T \Delta S\)
\(\Delta U\) and \(\Delta G\) are state functions but \(q\) and w are not state functions.
$(i)\,\,\Delta H_f^o\,\,of\,{H_2}{O_{(\ell )}}\, = \,\, - 68.3\,K\,\,cal\,\,mo{l^{ - 1}}$
$(ii)\,\,\Delta H_{comb}^o\,\,of\,{C_2}{H_2}\, = \,\, - 337.2\,K\,\,cal\,\,mo{l^{ - 1}}$
$(iii)\,\,\Delta H_{comb}^o\,\,of\,\,{C_2}{H_4}\,\, = \,\, - \,363.7\,\,K\,\,cal\,\,mo{l^{ - 1}} $
મિથેનના $C - H$બંધની રચનામાં આપવામાં આવેલી સરેરાશ ઊર્જાની ગણતરી કરવા માટે જાણવું જરૂરી છે કે નીચેનામાંથી કયું છે?
$2 \mathrm{C}_{(\mathrm{s})}+2 \mathrm{O}_2(\mathrm{~g}) 2 \mathrm{CO}_2(\mathrm{~g}), \Delta \mathrm{H}=-787 \mathrm{KJ} ; \mathrm{H}_2(\mathrm{~g})+$$\mathrm{H}_2 \mathrm{O}, \Delta \mathrm{H}=-286 \mathrm{KJ}$
$\frac{1}{2} \mathrm{O}_2 \mathrm{C}_2 \mathrm{H}_2(g)+\frac{5}{2} \mathrm{O}_2(g) \rightarrow 2 \mathrm{CO}_2(g)+\mathrm{H}_2 \mathrm{O}(I), \Delta H=-1310KJ$