From the enthalpies of reaction: H2 (g)   +   F2(g)    ------- >  2 HF (g)          ∆H = -537 kJ C(s)  +   2 F2 (g)     ------- >   CF4(g)           ∆H = - 680 kJ 2 C (s)  +  2 H2(g)  ------- >   C2H4 (g)       ∆H = + 52.3 kJ Calculate   ∆H for the reaction of ethylene with F2 :    C2H4(g)   +   6 F2 (g)  ------- >   2 CF4(g)  +   4 HF (g)

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From the enthalpies of reaction:

H2 (g)   +   F2(g)    ------- >  2 HF (g)          ∆H = -537 kJ

C(s)  +   2 F2 (g)     ------- >   CF4(g)           ∆H = - 680 kJ

2 C (s)  +  2 H2(g)  ------- >   C2H4 (g)       ∆H = + 52.3 kJ

Calculate   ∆H for the reaction of ethylene with F2 :   

C2H4(g)   +   6 F2 (g)  ------- >   2 CF4(g)  +   4 HF (g)

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