题目内容

(4分)已知:C(s)+O2(g)  CO2(g)       ΔH="-437.3" kJ·mol一1
H2(g)+O2(g)  H2O(g)    ΔH ="-285.8" kJ·mol一1
CO(g)+O2(g)  CO2(g)    ΔH ="-283.0" kJ·mol一1
则煤的气化主要反应(碳和水蒸气反应生成一氧化碳和氢气)的热化学方程式是
                                                                               
(4分)C(s) + H2O(g)  CO(g) + H2(g) ΔH=131.5 kJ·mol-1(热化学方程式状态漏写或反应热错均不得分)
①C(s)+O2(g)  CO2(g)       ΔH="-437.3" kJ·mol一1
②H2(g)+O2(g)  H2O(g)    ΔH ="-285.8" kJ·mol一1
? CO(g)+O2(g)  CO2(g)    ΔH ="-283.0" kJ·mol一1
①+(-②)+(-?),得C(s) + H2O(g)  CO(g) + H2(g) ΔH=+131.5 kJ·mol-1
点评:考查热化学方程式的相关计算;
练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网