甲烷是一种高效清洁的新能源,0.25mol甲烷完全燃烧生成液态水时放出222.5kJ热量,则下列热化学方程式中正确的是
A.2CH4(g) + 4O2(g) ="=" 2CO2(g) + 4H2O(l) ΔH =" +890" kJ·mol-1 |
B.CH4(g) + 2O2(g) ="=" CO2(g) +2H2O(l) ΔH =" +890" kJ·mol-1 |
C.CH4(g) + 2O2(g) ="=" CO2(g) +2H2O(l) ΔH =-890 kJ·mol-1 |
D.2CH4(g) + 4O2(g) ="=" 2CO2(g) + 4H2O(l) ΔH =-890 kJ·mol-1 |