单选题 适中0.65 引用3 组卷363
已知C(s)、H2(g)、CH3COOH(l)的燃烧热分别是393.5kJ·mol-1、285.8kJ·mol-1和870.3kJ·mol-1(注:CH3COOH的燃烧产物是CO2和H2O,则反应2C(g)+2H2+O2(g)=CH3COOH(l)的ΔH为
A.-488.3kJ·mol-1 | B.-762.6kJ·mol-1 |
C.-654.9kJ·mol-1 | D.+191kJ·mol-1 |
20-21高一下·河北石家庄·期末
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已知下列热化学方程式:
①CH3COOH(l)+2O2(g)=2CO2(g) +2H2O(l) ΔH1=﹣870.3 kJ·mol-1
②C(s) +O2(g) =CO2(g) ΔH2=﹣393.5 kJ·mol-1
③H2(g) +O2(g) =H2O(l) ΔH3=﹣285.8 kJ·mol-1
则反应2C(s) +2H2(g) +O2(g)=CH3COOH(l)的焓变ΔH为
①CH3COOH(l)+2O2(g)=2CO2(g) +2H2O(l) ΔH1=﹣870.3 kJ·mol-1
②C(s) +O2(g) =CO2(g) ΔH2=﹣393.5 kJ·mol-1
③H2(g) +O2(g) =H2O(l) ΔH3=﹣285.8 kJ·mol-1
则反应2C(s) +2H2(g) +O2(g)=CH3COOH(l)的焓变ΔH为
A.﹣488.3 kJ·mol-1 | B.﹣224.15 kJ·mol-1 |
C.488.3 kJ·mol-1 | D.244.15 kJ·mol-1 |
已知下列反应的热化学方程式为
①CH3COOH(l)+2O2(g)=2CO2(g)+2H2O(l) ΔH1=-870.3kJ·mol-1
②C(s)+O2(g)=CO2(g) ΔH2=-393.5kJ·mol-1
③H2(g)+O2(g)=H2O(l) ΔH3=-285.8kJ·mol-1
则反应2C(s)+2H2(g)+O2(g)=CH3COOH(l)的ΔH为( )
①CH3COOH(l)+2O2(g)=2CO2(g)+2H2O(l) ΔH1=-870.3kJ·mol-1
②C(s)+O2(g)=CO2(g) ΔH2=-393.5kJ·mol-1
③H2(g)+O2(g)=H2O(l) ΔH3=-285.8kJ·mol-1
则反应2C(s)+2H2(g)+O2(g)=CH3COOH(l)的ΔH为( )
A.-488.3kJ·mol-1 |
B.-191kJ·mol-1 |
C.-476.8kJ·mol-1 |
D.-1549.6kJ·mol-1 |
已知下列反应的热化学方程式为
①CH3COOH(l)+2O2(g)=2CO2(g)+2H2O(l) ΔH1=-870.3 kJ·mol-1
②C(s)+O2(g)=CO2(g) ΔH2=-393.5 kJ·mol-1
③H2(g)+ O2(g)=H2O(l) ΔH3=-285.8 kJ·mol-1
则反应2C(s)+2H2(g)+O2(g)=CH3COOH(l)的ΔH为
①CH3COOH(l)+2O2(g)=2CO2(g)+2H2O(l) ΔH1=-870.3 kJ·mol-1
②C(s)+O2(g)=CO2(g) ΔH2=-393.5 kJ·mol-1
③H2(g)+ O2(g)=H2O(l) ΔH3=-285.8 kJ·mol-1
则反应2C(s)+2H2(g)+O2(g)=CH3COOH(l)的ΔH为
A.-207 kJ·mol-1 | B.-488.3 kJ·mol-1 |
C.-1549.6 kJ·mol-1 | D.-476.8 kJ·mol-1 |
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