—Yes.He needs to eat more food.
A:tall
B:heavy
C:fat
D:thin
H2(g)
Br2(g)
HBr(g)
1mol分子中的化学键断裂时需要吸收的能量/kJ
436
200
369
则已知H2(g)+Br2(g)=2HBr (g)△H 为( )