CH3CH2CH3(g)+Cl•(g)→CH3HCH3(g)+HCl(g) △H1=-34kJ·mol-1(1)
CH3CH2CH3(g)+Cl•(g)→CH3CH2H2(g)+HCl(g) △H2=-22kJ·mol-1(2)
CH3CH2CH3(g)+Br•(g)→CH3CH2H2(g)+HBr(g) △H2=+44kJ·mol-1(3)
下列说法错误的是( )
A . CH3HCH3比CH3CH2H2稳定
B . 当温度升高,反应(1)和(2)的v正均升高,反应(3)的v正降低
C . 丙烷和Cl2在光照下发生取代反应生成的二氯丙烷最多有4种
D . 已知Cl-Cl的键能为243kJ·mol-1 , C-Cl的键能为327kJ·mol-1 , 则CH3CH2CH3(g)+Cl2(g)→CH3CHClCH3(g)+HCl(g) △H=-118kJ·mol-1