Jawabanmu

2014-03-24T18:15:15+07:00
C = C = 607 = KJ/MOL
C - H = 413 = KJ/MOL
Br - Br = 193 = KJ/MOL
C - C = 346 = KJ/MOL
C - Br = 276 = KJ/MOL
hitung entalpi pada reaksi :
C₂H₄ + Br₂ -> CH₂Br + CH₂Br
help me,,
ΔH=€reaktan-hasil
    =[(2.C-H)+(C-C)+(Br-Br)]-[(4.C-H)+(2.Br-C)]
     =[(2.
413)+(346)+(193)]-[(4.413)+(2.193)]
     =(346)-(826+193)
     =(346)-(1019)=-673kJ/mol