你可能感兴趣的试题
H2O(g)=H2(g)+1/2O2(g) △H.(298K)=+242KJ/mol 2H2(g)+O2(g)=2H2O(1) △H.(298K)=-484KJ/mol H2(g)+1/2O2(g)=H2O(g) △H.(298K)=+242KJ/mol 2H2(g)+O2(g)=2H2O(g) △H.(298K)=+484KJ/mol
Δ H3=ΔH1+2ΔH2 Δ H3=ΔH1+ΔH2 Δ H3=ΔH1-2ΔH2 Δ H3=ΔH1-ΔH2
Sn+2Cl2=SnCl4 ΔH(298K)=-154.4kJ・mol-1
Sn(s)+2Cl2(g)=SnCl4(s) ΔH(298K)=-545.2kJ
Sn(s)+2Cl2(g)=SnCl4(s) ΔH(298K)=-154.4kJ・mol-1
Sn(s)+2Cl2(g)=SnCl4(s) ΔH(298K)=-545.2kJ・mol-1
它们都是吸热反应 a、b和c均为正值
a=b 2b=c
4.5×10-4 0.015 5.4×10-5 无法计算
⊿H3=⊿H1+2⊿H2 ⊿H3=⊿H1+⊿H2
⊿H3=⊿H1-2⊿H2 ⊿H3=⊿H1-⊿H2
△H3=△H1+2△H2 △H3=△H1+△H2 △H3=△H1-2△H2 △H3=△H1-△H2
138kPa 11.99kPa 4.9kPa 49kPa
△H3=△H1+2△H2 △H3=△H1+△H2 △H3=△H1﹣2△H2 △H3=△H1﹣△H2
130.38kPa 0.767kPa 7607kPa 7.67×10-3kPa
△H3 =2△H1+2△H2 △H3 =2△H1—△H2 △H3 =2△H1—2△H2 △H3 =2△H1+△H2
ΔH3=ΔH1+2ΔH2 Δ H3=ΔH1+ΔH2 ΔH3=ΔH1-2ΔH2 Δ H3=ΔH1-ΔH2
ΔH3=ΔH1+2ΔH2 ΔH3=ΔH1+ΔH2 ΔH3=ΔH1-ΔH2 ΔH3=ΔH1-2ΔH2