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 答案:DShe didn’t study medicine. _________, she
decided to become an actor.
A. But B.
Instead C.
Although D. So