apabila diketahui energi ikatan rata rata : C-H =413 kJ mol-1 Cl-Cl =239 kJ mol-1 C-Cl=339 kj mol-1 H-Cl =427kJ mol-1. entalpi reaksi CH4(g) + Cl2(g) -> CH3Cl(g) + HCl(g) sebesar..

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apabila diketahui energi ikatan rata rata : C-H =413 kJ mol-1 Cl-Cl =239 kJ mol-1 C-Cl=339 kj mol-1 H-Cl =427kJ mol-1. entalpi reaksi CH4(g) + Cl2(g) -> CH3Cl(g) + HCl(g) sebesar..

4×413=1652
1×239=239
——————
= 1891 KJ mol-1
3×413=1239
1×427=427
1×339=339
——————
=2005 KJ mol-1

1891-2005 = – 114 KJ mol -1