已知: Zn(s) + 1/2 O 2 (g) = ZnO(s) ∆ r H m q 1 = -351.5 kJ · mol -1 Hg(l) + 1/2 O 2 (g) = HgO(s , 红 ) ∆ r H m q 2 = -90.8 kJ · mol -1 则 Zn(s) + HgO(s , 红 ) = ZnO(s) + Hg(l) 的 ∆ r H m q 为( ) (kJ · mol -1 )
举一反三
- 已知Zn(s) + 1/2O2(g) = Zn (s), ∆rHmӨ= -348.28 kJ·mol-1Hg(l) + 1/2O2(g) = HgO(s), ∆rHmӨ= -90.83 kJ·mol-1则Zn(s) + HgO(s) = ZnO(s) + Hg(l)的∆rHmӨ是
- 【单选题】由下列数据确定CH 4 (g)的为Δ f H m Θ 为 () C ( 石墨 ) +O 2 (g)=CO 2 (g) Δ r H m Θ =-393.5kJ·mol - 1 H 2 (g)+1/2O 2 (g)=H 2 O(l) Δ r H m Θ =-285.8kJ·mol - 1 CH 4 (g)+2O 2 (g)=CO 2 (g)+2H 2 O ( l ) Δ r H m Θ =-890.3kJ·mol - 1 A. 211 kJ·mol -1 B. -74.8kJ·mol - 1 C. 890.3 kJ·mol - 1 D. 缺条件,无法算
- 已知:Zn(s)+(1/2)O2 = ZnO 0394cHm=351.5 kJ00b7mol-1 Hg(l)+(1/2)O2 = HgO 0394cHm= 90.8 kJ00b7mol-1 因此 Zn+HgO = ZnO+Hg 的0394rHm是:
- 根据下列两个热化学方程式;A.Zn(s)+1/2O2(g)=ZnO(S),△H=-351.5kJ·mol-1 B.Hg(l)+1/2O2(g)=HgO(s),△,H=-90.8kJ,mol-1 由此可知,反应Zn(s)+HgO(s)=Hg(l)+ZnO(s)的△H等于
- 下列反应中,哪个是表示ΔH=ΔHfA、gB、r(s)的反应?() A: B: g( C: q)+ D: r( E: q)= F: g G: r(s) H: 2 I: g(s)+ J: r2=2 K: g L: r(s) M: N: g(s)+1/2 O: r2(l)= P: g Q: r(s) R: S: g(s)+1/2 T: r2(S)= U: g V: r(s)