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= +890KJ・mol―1
B. CH4(g) + 2O2(g) = CO2(g) +2H2O(l); ΔH=+890KJ・mol―1
C. CH4(g) + 2O2(g) = CO2(g) +2H2O(l); ΔH= -890KJ・mol―1
D. 2CH4(g) + 4O2(g) = 2CO2(g) + 4H2O(l);ΔH= -890KJ・mol―1
C
燃烧热和中和热的异同:
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