Question

In: Chemistry

Calculate ΔrxnS, ΔrxnH, and ΔrxnG at 298Kfor the reaction below: 2 C3H6 (g) ----------------->   C2H4 (g)    ...

Calculate ΔrxnS, ΔrxnH, and ΔrxnG at 298Kfor the reaction below:

2 C3H6 (g) ----------------->   C2H4 (g)     +     C4H8 (g)

Solutions

Expert Solution

DH of C3H6 = 20.42 kj/mole

DH of C2H4 = 52.3Kj/mole

DH of C4H8 = -15.8

DH of reaction = [DH of products] - [DH of reactents]

                      = [-15.8+52.3] - [2*20.42]

                      = 32.16 KJ

........................................................................................................................

DS of recation = [DS of products] - [DS of reactents]

                     = [219.56 + 298.83] - [2*267.05]

                     = - 15.71 Kj

.............................................................................................................................

DG of reaction = DH of reaction - T*Ds of reaction

                      = 32.16 -[298*(-15.71)]

                      = 4713.74 KJ


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