(1)CH4(g)+2O2(g)=CO2(g)+2H2O(l),△H1=-890.3kj/molC(石墨,s)+O2(g)=CO2(g),△H2=-393.5kj/molH2(g)+1/2O2(g)=H2O(l),△H3=-285.8KJ/MOL求C(石墨,s)+2H2(g)=CH4(g),△H=?(2)CH4(g)+2O2(g)=2CO(g)+4H2(g),△H1=-71KJ/MOLCO(g)+2H2(g)=CH3OH(l),△H2=-90.5KJ/
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(1)CH4(g)+2O2(g)=CO2(g)+2H2O(l),△H1=-890.3kj/molC(石墨,s)+O2(g)=CO2(g),△H2=-393.5kj/molH2(g)+1/2O2(g)=H2O(l),△H3=-285.8KJ/MOL求C(石墨,s)+2H2(g)=CH4(g),△H=?(2)CH4(g)+2O2(g)=2CO(g)+4H2(g),△H1=-71KJ/MOLCO(g)+2H2(g)=CH3OH(l),△H2=-90.5KJ/
(1)CH4(g)+2O2(g)=CO2(g)+2H2O(l),△H1=-890.3kj/mol
C(石墨,s)+O2(g)=CO2(g),△H2=-393.5kj/mol
H2(g)+1/2O2(g)=H2O(l),△H3=-285.8KJ/MOL
求C(石墨,s)+2H2(g)=CH4(g),△H=?
(2)CH4(g)+2O2(g)=2CO(g)+4H2(g),△H1=-71KJ/MOL
CO(g)+2H2(g)=CH3OH(l),△H2=-90.5KJ/MOL
CH4(g)+2O2(g)=CO2(g)+2H2O(l),△H3=-890KJ/MOL
求CH3OH(l)+3/2O2(g)=CO2(g)+2H2O(l),求甲醇的燃烧热的△H
(3)H2S+3/2O2(g)=SO2(g)+H2O(g),△H1
2H2S(g)+SO2(g)=3/2S2(g)+2H2O,△H2
H2S(g)+1/2O2(g)=S(g)+H2O(g),△H3
求2S(g)=S2(g),△H4=?
(1)CH4(g)+2O2(g)=CO2(g)+2H2O(l),△H1=-890.3kj/molC(石墨,s)+O2(g)=CO2(g),△H2=-393.5kj/molH2(g)+1/2O2(g)=H2O(l),△H3=-285.8KJ/MOL求C(石墨,s)+2H2(g)=CH4(g),△H=?(2)CH4(g)+2O2(g)=2CO(g)+4H2(g),△H1=-71KJ/MOLCO(g)+2H2(g)=CH3OH(l),△H2=-90.5KJ/
用盖斯定律定压或定容条件下的任意化学反应,在不做其它功时,不论是一步完成的还是几步完成的,其热效应总是相同的(反应热的总值相等).这叫作盖斯定律.
关键是判断总方程式中的反应物和产物,找到对应分步方程式的反应物和产物,同时确定计量关系.
举个例子:(1)△H2 + 2*△H3 - △H1
母鸡呀,看都看不懂累