下列过程的DrHmy在数值上等于晶格能的是( )
A: NaBr(s)→Na+(s)+1/2Br2(l)
B: NaBr(s)→Na(g)+Br(g)
C: NaBr(s)→Na+(g)+Br-(g)
D: NaBr(s)→Na(g)+1/2Br2(g)
A: NaBr(s)→Na+(s)+1/2Br2(l)
B: NaBr(s)→Na(g)+Br(g)
C: NaBr(s)→Na+(g)+Br-(g)
D: NaBr(s)→Na(g)+1/2Br2(g)
举一反三
- 下列反应ΔrHmө代表NaCl(s)的ΔfHmө的是()。 A: Na+(g)+Cl-(g)=NaCl(s) B: Na(s)+(1/2)Cl2(g)=NaCl(s) C: Na(s)+Cl(g)=NaCl(s) D: Na(g)+Cl(g)=NaCl(S)
- 下列反应中哪个是表示ΔrHmӨ = ΔfHmӨ(AgBr, s)的反应 A: 2Ag(s) + Br2(g) =2AgBr(s) B: Ag(s) + 1/2Br2(l) = AgBr(s) C: Ag(s) +1/2Br2(g) = AgBr(s) D: Ag(aq) + Br(aq) =AgBr(s)
- 下列反应中表达式正确的是() A: Na(s)+1/2 Cl2 (g) = NaCl(s) ΔrHmθ=ΔfHmθ(NaCl,s) B: C(石墨) + H2(g) = 1/2 C2H4(g) ΔrHmθ=ΔfHmθ (C2H4,g) C: CO(g)+ 1/2 O2(g) = CO2(g) ΔrHmθ=ΔfHmθ (CO2,g) D: CH3OH(g) + O2(g) = CO (g) + 2H2O(g) ΔrHmθ=ΔcHmθ(CH3OH,g)
- 在298K,下列反应中最接近的是() A: CCl4(g)+2H2O(g)=CO2(g)+4HCl(g) B: CaO(s)+CO2(g)=CaCO3(s) C: Cu2+(aq)+Zn(s)=Cu(s)+Zn2+(aq) D: Na(s)+H2O(l)=Na+(aq)+1/2H2(g)+OH-(aq)
- 具有最小摩尔熵的物质是() A: Br(l) B: NaCl(s) C: Na(s) D: Cl(g)