问题
选择题
已知H2(g)、C2H4(g)和C2H5OH(l)的燃烧热分别是-285.8 kJ/mol、-1411.0 kJ/mol和-1366.8
kJ/mol,则由C2H4(g)和H2O(l)反应生成C2H5OH(l)的ΔH为 [ ]
A.-44.2 kJ/mol
B.+44.2 kJ/mol
C.-330 kJ/mol
D.+330 kJ/mol
答案
答案:A
已知H2(g)、C2H4(g)和C2H5OH(l)的燃烧热分别是-285.8 kJ/mol、-1411.0 kJ/mol和-1366.8
kJ/mol,则由C2H4(g)和H2O(l)反应生成C2H5OH(l)的ΔH为 [ ]
A.-44.2 kJ/mol
B.+44.2 kJ/mol
C.-330 kJ/mol
D.+330 kJ/mol
答案:A