下列说法正确的是
A.若2H2(g)+O2(g) = 2H2O(g)ΔH=" -483.6" kJ·mol-1,则H2燃烧热为241.8 kJ·mol-1 |
B.原子弹爆炸是放热反应 |
C.若C(石墨,s) = C(金刚石,s)ΔH>0,则石墨能量低且键能小 |
D.由BaSO4(s) + 4C(s) =" 4CO(g)" + BaS(s) △H1 = +571.2kJ•mol-1 ① |
BaSO4(s) + 2C(s) = 2CO2(g) + BaS(s) △H2 = +226.2kJ•mol-1 ②
可得反应C(s) + CO2(g) =" 2CO(g)" 的△H = +172.5kJ•mol-1