问题
选择题
下列两组热化学方程式中，有关△H的比较，正确的是[ ]
①CH4(g)＋2O2(g) ====CO2(g)＋2H2O(g)；△H1
CH4(g)＋2O2(g) ====CO2(g)＋2H2O(l)；△H2
②NaOH(aq) +1/2H2SO4(浓)==== 1/2Na2SO4(aq) +H2O(l) ；△H3
NaOH(aq) + CH3COOH (aq)==== CH3COONa (aq) +H2O(l) ；△H4
A．△H1＞△H2；△H3＞△H4
B．△H1＞△H2；△H3＜△H4
C．△H1＝△H2；△H3＜△H4
D．△H1＜△H2；△H3＞△H4
答案
答案：B