试题 试卷
题型:单选题 题类:常考题 难易度:普通
浙江省诸暨市牌头中学2018-2019学年高一下学期化学期中考试试卷
P4(g)+10Cl2(g)=4PCl5(g) ΔH=b kJ·mol-1 ,
P4具有正四面体结构,PCl5中P—Cl键的键能为c kJ·mol-1 , PCl3中P—Cl键的键能为1.2c kJ·mol-1。下列叙述正确的是( )
①“气化”:C(s)+2H2O(g)=CO2(g)+2H2(g)ΔH1=+90.1kJ·mol-1
②催化液化I:CO2(g)+3H2(g)=CH3OH(g)+H2O(g)△H2=-49.0kJ·mol-1
③催化液化Ⅱ:CO2(g)+2H2(g)=CH3OH(g)+ O2(g)△H3=akJ·mol
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