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题目内容
(河北建筑工程学院普通化学)
下列反应中表达式正确的是( )。(单选)—5分
A Na(s)+1/2 Cl2 (g) = NaCl(s) ΔrHmθ=ΔfHmθ(NaCl,s)
B C(石墨) + H2(g) = 1/2 C2H4(g) ΔrHmθ=ΔfHmθ (C2H4,g)
C CO(g)+ 1/2 O2(g) = CO2(g) ΔrHmθ=ΔfHmθ (CO2,g)
D CH3OH(g) + O2(g) = CO (g) + 2H2O(g) ΔrHmθ=ΔcHmθ(CH3OH,g)
A Na(s)+1/2 Cl2 (g) = NaCl(s) ΔrHmθ=ΔfHmθ(NaCl,s)
B C(石墨) + H2(g) = 1/2 C2H4(g) ΔrHmθ=ΔfHmθ (C2H4,g)
C CO(g)+ 1/2 O2(g) = CO2(g) ΔrHmθ=ΔfHmθ (CO2,g)
D CH3OH(g) + O2(g) = CO (g) + 2H2O(g) ΔrHmθ=ΔcHmθ(CH3OH,g)
参考答案