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∑ΔfHo298(sp)-∑ΔfHo298(cđ)=2ΔfHo298(CO2(g))+3ΔfHo298(H2O)ΔfHo298(C2H6(g))

=(-393,5×2)+(285,8×3)-(-84,7)

=-1559,7

Công thức tính tốc độ phản ứng theo chất tham gia: ¯v=−ΔC/Δt

Tốc độ phản ứng sau 4s theo tert-butyl chloride:

¯v=−0,10−0,224/4=0,03(M/s)

, 2KMnO4+16HCl→2KCl +2MnCl2+5Cl2+8H2O

Chất khử là HCl , Chất oxi hóa làKMnO4

 Quá trình oxi hóa : 2CL-→Cl2+2

Quá trình khử : Mn+7+5e→Mn+2

b, nNaI =0,2×0,1=0,02mol

PTHH:NaI + Cl2-->2NaCl+I2

Mol:    0,02--->0,01

Pthh:2KMnO4+16HCl(đặc)--->2KCl+2MnCl2+5Cl2+8H2O

           0,004               < ----- 0,01

mKMnO4=n.M=0,004×158=0,632g