C(金刚石,s)+O2(g)=CO2(g) ΔH1
C(石墨,s)+O2(g)=CO2(g) ΔH2
C(石墨,s)=C(金刚石,s) ΔH3=+1.9 kJ·mol-1
下列说法正确的是( )
H2O(g)=H2(g)+ O2(g) ΔH=+241.8 kJ/mol
H2(g)+ O2(g)=H2O(l) ΔH=-285.8 kJ/mol,当1 g液态水变为水蒸气时,其热量变化是( )
①CH4(g)+4NO2(g)=4NO(g)+CO2(g)+2H2O(g) ΔH=-574 kJ·mol-1
②CH4(g)+4NO(g)=2N2(g)+CO2(g)+2H2O(g) ΔH=-1 160 kJ·mol-1
下列说法不正确的是( )
①C(s)+O2(g)=CO2(g) ΔH1=-393.5 kJ/mol
②H2(g)+ O2(g)=H2O(l) ΔH2=-285.8 kJ/mol
③CH3COOH(l)+2O2(g)=2CO2(g)+2H2O(l) ΔH3=-870.3 kJ/mol
可以计算出2C(s)+2H2(g)+O2(g)=CH3COOH(l)的反应热为( )
4Al(s)+3O2(g)=2Al2O3(s) ΔH1
4Al(s)+2O3(g)=2Al2O3(s) ΔH2
3O2(g)=2O3(g) ΔH3则( )
CO2(g)+C(s)=2CO(g) ΔH2
2CO(g)+O2(g)=2CO2(g) ΔH3
4Fe(s)+3O2(g)=2Fe2O3(s) ΔH4
3CO(g)+Fe2O3(s)=3CO2(g)+2Fe(s) ΔH5
下列关于上述反应焓变的判断正确的是( )
则Zn(s)+Ag2O(s)=ZnO(s)+2Ag(s)的ΔH等于( )
4Al(s)+3O2(g)=2Al2O3(s) ΔH=-2 834.9 kJ·mol-1
4Al(s)+2O3(g)=2Al2O3(s) ΔH=-3 119.1 kJ·mol-1
由此得出的正确结论是( )
30 g二甲基肼完全燃烧放出的热量为( )
CO(g)+ O2(g)= CO2(g) ΔH=−283.0 kJ·mol−1②
C(石墨)+O2(g)= CO2(g) ΔH=−393.5 kJ·mol−1③
则4Fe(s)+3O2(g)= 2Fe2O3(s)的ΔH为( )
①C、CO ②S、SO2 ③Na、Na2O ④AlCl3、Al(OH)3 ⑤Fe、Fe(NO3)2 ⑥NaOH、Na2CO3
试回答下列问题: