If Δ fH° C2 H4 and Δ fH° C2 H6 are x1 and x2Kcal/mol, then heat of hydrogenation of C2H4 is:-

Question

If Δ fH° C2 H4 and Δ fH° C2 H6 are x1 and x2Kcal/mol, then heat of hydrogenation of C2H4 is:- (A) x1+x2 (B) x1-x2 (C) x2-x1 (D) x1+2x2

Tardigrade Admin · Accepted Answer

C 2 H 4+ H 2 arrow C 2 H 6 Δ H rxn ° Δ H rxn °=Δ H f ° C 2 H 6-Δ H f ° C 2 H 4 = x 2- x 1

Q. If $Δ_{f} H^{\circ} C_{2} H_{4}$ and $Δ_{f} H^{\circ} C_{2} H_{6}$ are $x_{1}$ and $x_{2} Kc a l / m o l,$ then heat of hydrogenation of $C_{2} H_{4}$ is:-