试题 试卷
题型:单选题 题类:常考题 难易度:容易
浙江省台州市五校2019-2020学年高三上学期化学10月月考试卷
①C8H18(l)+ 25/2O2(g)= 8CO2(g)+ 9H2O(l); △H = +5518kJ/mol
②C8H18(l)+ 25/2O2(g)= 8CO2(g)+ 9H2O(l); △H = -5518kJ/mol
③H+(aq)+ OH-(aq)= H2O(l); △H = -57.3kJ/mol
④1/2H2SO4(aq) + NaOH(aq) =1/2Na2SO4(aq) + H2O(l); △H = +57.3kJ/mol
某研究小组在实验室用重晶石(主要成分BaSO4)对工业过程进行模拟实验。查表得
BaSO4(s) + 4C(s) 4CO(g) + BaS(s) △H1 =+571.2 kJ·mol-1①
BaSO4(s) + 2C(s) 2CO2(g) + BaS(s) △H2=+226.2 kJ·mol-1②
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