微考点46盖斯定律的全面应用一、利用盖斯定律计算反应热1.已知在298K时下述反应的有关数据如下:C(s)+O2(g)===CO(g)ΔH1=-110.5kJ·mol-1C(s)+O2(g)===CO2(g)ΔH2=-393.5kJ·mol-1则C(s)+CO2(g)===2CO(g)的ΔH为()A.+283.5kJ·mol-1B.+172.5kJ·mol-1C.-172.5kJ·mol-1D.-504kJ·mol-12.在25℃、101kPa条件下,C(s)、H2(g)、CH3COOH(l)的燃烧热ΔH分别为-393.5kJ·mol-1、-285.8kJ·mol-1、-870.3kJ·mol-1,则2C(s)+2H2(g)+O2(g)===CH3COOH(l)的反应热为()A.-488.3kJ·mol-1B.+488.3kJ·mol-1C.-191kJ·mol-1D.+191kJ·mol-1二、利用盖斯定律书写热化学方程式3.(2016·泰州模拟)已知在常温常压下:①2CH3OH(l)+3O2(g)===2CO2(g)+4H2O(g)ΔH1=-1275.6kJ·mol-1②2CO(g)+O2(g)===2CO2(g)ΔH2=-566.0kJ·mol-1③H2O(g)===H2O(l)ΔH3=-44.0kJ·mol-1写出甲醇不完全燃烧生成一氧化碳和气态水的热化学方程式:________________________________________________________________________________________________________________________________________________。4.(2016·新沂一中高三上学期9月月考)(1)如图所示表示的是NO2和CO反应生成CO2和NO过程中能量变化示意图,请写出NO2和CO反应的热化学方程式:________________________________________________________________________。(2)已知:①Fe2O3(s)+3CO(g)===2Fe(s)+3CO2(g)ΔH=-25kJ·mol-1②3Fe2O3(s)+CO(g)===2Fe3O4(s)+CO2(g)ΔH=-47kJ·mol-1③Fe3O4(s)+CO(g)===3FeO(s)+CO2(g)ΔH=+19kJ·mol-1请写出CO还原FeO的热化学方程式:____________________________________________________________________________________________________________。5.(2016·无锡一中考前模拟)已知:①C(s)+O2(g)===CO2(g)ΔH=akJ·mol-1②CO2(g)+C(s)===2CO(g)ΔH=bkJ·mol-1③Si(s)+O2(g)===SiO2(s)ΔH=ckJ·mol-1工业上生产粗硅的热化学方程式为__________________________________________________________________________________________________________________。三、盖斯定律综合利用6.(2016·扬州第一次诊断)已知:①CH3OH(g)+O2(g)===CO2(g)+2H2O(g)ΔH=-akJ·mol-1②CH4(g)+2O2(g)===CO2(g)+2H2O(g)ΔH=-bkJ·mol-1③CH4(g)+2O2(g)===CO2(g)+2H2O(l)ΔH=-ckJ·mol-1则下列叙述正确的是()A.由上述热化学方程式可知b