11.已知298K时有下述反应:C(s)+1/2 O2 △H1 = -110.5kJ·mol-1 C(s)+O2 (g)=CO2(g), △H 2 = -393.5kJ/mol-1 则C(s)+ CO2的△H为: A.+283. kJ·mol-1 B.+172.5 kJ·mol-1 C.-172.5 kJ·mol-1 D.-504 kJ·mol-1 查看更多

 

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已知在298K时下述反应的有关数据:
C(s)+1/2 O2 (g)=CO(g) △H1 = -110.5kJ/mol
C(s)+O2 (g)=CO2 (g) △H2= -393.5kJ/mol
则C(s)+CO2 (g)=2CO(g) 的△H为
[     ]
A.283.5kJ/mol
B.172.5kJ/mol
C.-172.5kJ/mol
D.-504 kJ/mol

查看答案和解析>>

已知在298K时下述反应的有关数据:
C(s)+1/2 O2(g)=CO(g) △H1 = -110.5kJ/mol,
C(s)+O2(g)=CO2(g) △H2= -393.5kJ/mol ,
则C(s)+CO2(g)=2CO(g) 的△H为
[     ]
A.+283.5kJ/mol
B.+172.5kJ/mol
C.-172.5kJ/mol
D.-504 kJ/mol

查看答案和解析>>

已知在298K时下述反应的有关数据:

C(s)+1/2 O2 (g)=CO(g)   △H1 = -110.5kJ/mol,

C(s)+O2 (g)=CO2 (g)     △H 2= -393.5kJ/mol ,

则C(s)+CO2 (g)=2CO(g) 的△H为

A.+283.5kJ/mol    B.+172.5kJ/mol   C.-172.5kJ/mol    D.-504 kJ/mol 

查看答案和解析>>

已知298K时下述反应的有关数据:C(s)+1/2 O2(g)=CO(g) △H1 = -110.5kJ·mol-1
C(s)+O2 (g)=CO2(g), △H2= -393.5kJ/mol 则 C(s)+CO2(g)="2CO(g)" 的△H为

A.283. kJ·mol-1 B.+172.5 kJ·mol-1 
C.-172.5 kJ·mol-1 D.-504 kJ·mol-1 

查看答案和解析>>

已知298K时下述反应的有关数据:C(s)+1/2 O2(g)=CO(g) △H1 = -110.5kJ·mol-1
C(s)+O2 (g)=CO2(g), △H2= -393.5kJ/mol 则 C(s)+CO2(g)="2CO(g)" 的△H为
A.283. kJ·mol-1B.+172.5 kJ·mol-1
C.-172.5 kJ·mol-1D.-504 kJ·mol-1

查看答案和解析>>


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