Question

已知在1×105Pa、298K条件下，2mol氢气燃烧生成水蒸气放出484kJ热量，下列热化学方程式正确的是
A．	H2O(g)＝H2(g)＋O2(g)；H＝＋242kJ·mol－1
B．	2H2(g)＋O2(g)＋2H2O(l)；H＝－484kJ·mol－1
C．	H2(g)＋O2(g)＝H2O(g)；H＝＋242kJ·mol－1
D．	2H2(g)＋O2(g)＝2H2O(g)；H＝－484kJ·mol－1

Answer 1

答案：AD