7.已知下列几种烷烃的燃烧热数据如下:
烷烃 |
甲烷 |
乙烷 |
丙烷 |
丁烷 |
燃烧热/(kJ/mol-1) |
890 |
1560 |
2220 |
2880 |
据此判断,表示戊烷燃烧的热化学方程式正确的是
A.C5H12(l) + 8O2(g) = 5CO2(g) + 6H2O(l);△H = - 3540 kJ/mol
B.C5H12(l) + 8O2(g) = 5CO2(g) + 6H2O(g);△H = - 3540 kJ/mol
C.C5H12(l) + 8O2(g) = 5CO2(g) + 6H2O(g);△H = + 3540 kJ/mol
D.C5H12(l) + 8O2(g) = 5CO2(g) + 6H2O(l);△H = + 3540 kJ/mol