A gaseous mixture of propane, acetylene and `CO_(2)` is burnt in excess of air. Total `4800` KJ heat is evolved . The volume of `CO_(2)` formed during combustion is `224` liters at STP. The total evolved heat is used to perform two separate process: `(i)` Vapourising `87.5%` of water (liquid) obtained in the process of burning the original mixture. `(ii)` Forming `3808` litres ethylene measured at STP from its elements. `DeltaH_(H-H) = 435 KJ//mol " " DeltaH_(C-H) = 416 KJ//mol " " DeltaH_(C-C) = 347 KJ//mol` ` DeltaH_(C-C) = 615 KJ//mol, " " DeltaH_(C-C) = 812 KJ//mol" " DeltaH_("sublimation") "of " (C,s) = 718 KJ//mol` `DeltaH_(f)^(@)(C_(2)g) = -394 KJ//mol " "DeltaH_(f)^(@)(H_(2)O, l) = -286 KJ//mol. " " DeltaH_(f)^(@)(H_(2)O,g) = -247 KJ//mol.` `DeltaH_(rxxn)^(@) "for" C_(2)H_(2)(g) + H_(2)g rarr C_(2)H_(4)(g)`A. `-220 kJ//mol`B. `-180 KJ//mol`C. `-250 KJ//mol`D. `-200 KJ//mol`