相关数据如下表:
|
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
A.△H =" +" 102kJ/mol B.△H =" -" 102kJ/mol
C.△H =" +" 267kJ/mol D.△H =" -" 267kJ/mol
相关数据如下表:
|
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
A.△H =" +" 102kJ/mol B.△H =" -" 102kJ/mol
C.△H =" +" 267kJ/mol D.△H =" -" 267kJ/mol