Question

No 27,28,29 dengan cara ok,,,,,,,,,,,,,,,,

Answer 1

27.
ΔHc= -500Kj/mol
Mr=90
Massa=4gram
mol=massa/Mr
4/90=..?..mol
?molx500=ΔHc hasil
Sesuai dengan konteks soal,berarti
ΔHc hasil⇒4x500/90

28.
ΔHreaksi=ΔHproduk-ΔHreaktan
=(4xCO2)+(2xH2O)-(2xC2H2)+(5xO2)
=(4x -394)+(2x -242) - (2x52)+(5x0)
=-2060 -104
=-2164
Ditanya 52 gram C2H2
Mr C2H2=26
mol=52/26
=2 mol
ΔHc= -2164/2
=-1082

29.
A=
V2/V3=[A]₂x[B₂]₂/[A]₃x[B₂]₃
3,2X10^ -4/3,2X10^ -4=[0,50] [1.00]/[1,00] [1,00]
=1=[0,5]^N
N=0
B=
V1/V2=[A]₁X[B₂]₁/[A]₂ [B₂]₂
=1,6X10^ -4/3,2X10^ -4=[0,50] [0,50]/ [0,50] [1,00]
0,5=[0,5]^M
M=1
Orde reaksi=
0+1
=1