• 2022-06-28
    【1.1】25 ℃ C2H4(g)的DcHmΘ= -1410.97kJ/mol ;CO2(g)的DfHmΘ= -393.51kJ/mol ,H2O(l)的DfHmΘ= -285.85kJ/mol;则C2H4(g)的DfHmΘ=kJ/mol