试题 试卷
题型:综合题 题类:常考题 难易度:普通
江苏省盐城市2019-2020学年高二下学期化学期末考试试卷
N2(g)+3H2(g)=2NH3(g) ΔH1=-91.8kJ·mol-1
C(s)+2H2(g)=CH4(g) ΔH2=-75.0kJ·mol-1
H2(g)+2C(s)+N2(g)=2HCN(g) ΔH3=+270.0kJ·mol-1
则反应NH3(g)+CH4(g)=HCN(g)+3H2(g)的ΔH=kJ·mol-1。
已知:碳的燃烧热ΔH1=a kJ·mol-1;
S(s)+2K(s)=K2S(s) △H2=b kJ·mol-1
2K(s)+N2 (g)+3O2(g)=2KNO3(s) △H3= c kJ·mol-1;则x为( )
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