A.
已知H + (aq)+OH - (aq)==H 2 O(l);△H=-57.3kJ·mol -1 ,则H 2 SO 4 和Ba(OH) 2 反应的反应热△H=2×(-57.3)kJ·mol -1
B.
燃料电池中将甲醇蒸气转化为氢气的热化学方程式是CH 3 OH(g)+1/2O 2 (g)==CO 2 (g)+2H 2 (g); △H=-192.9 kJ·mol -1 ,则CH 3 OH的燃烧热为192.9 kJ·mol -1
C.
H 2 (g)的燃烧热是285.8 kJ·mol -1 ,则2H 2 O(g)==2H 2 (g)+O 2 (g);△H=+571.6 kJ·mol -1
D.
葡萄糖的燃烧热是2800 kJ·mol -1 ,则1/2 C 6 H 12 O 6 (s)+3O 2 (g)==3CO 2 (g)+3H 2 O ( l ); △H=-1400 kJ·mol -1