• 2022-06-28
    下列反应可以表示 DfGmΘ(CO2,g) = -394.4 kJ·mol–1的反应是
    A: C(石墨,s)+O2(g) = CO2(g)
    B: C(金刚石,s)+O2(g) = CO2(g)
    C: C(石墨,s)+O2(l) = CO2(l)
    D: C(石墨,s)+O2(g) = CO2(l)
  • A

    内容

    • 0

      下列哪个反应的△rHmΘ即为CO2(g)的△f HmΘ( ): A: C(石墨)+ 1/2O2(g)= CO(g) B: CO(g)+ 1/2O2(g)= CO2(g) C: C(石墨)+ O2(g)= CO2(g) D: C(金刚石)+ O2(g)= CO2(g)

    • 1

      *下列 反应的△rHmθ (298K)就是△fHmθ (CO2, g,298K)。 (A) CO(g)+1/2O2(g)=CO2(g) (B) C(金刚石)+O2(g)=CO2(g) (C) C(石墨)+O2(g)=CO2(g) (D) CO2(g) = C(石墨)+O2(g)

    • 2

      *下列反应的△rHmθ(298K)就是△fHmθ(CO2,g,298K)。 (A)CO(g)1/2O2(g)=CO2(g)(B)C(金刚石)O2(g)=CO2(g) (C)C(石墨)O2(g)=CO2(g)(D)CO2(g)=C(石墨)O2(g)

    • 3

      在相同温度时,下列各反应中,等压热效应与等容热效应相差最大的是答: ( ) A: MnO2(s) = MnO(s) + (1/2) O2(g) B: C(s) + O2(g) = CO2(g) C: 2CO(g) + O2(g) = 2CO2(g) D: CO(g) + (1/2) O2(g) = CO2(g)

    • 4

      某温度下,反应(1),(2)和(3)的标准平衡常数分别为K10398,K20398,K30398,则反应(4)的K0398等于: (1)CoO(s) + CO(g) = Co(s) + CO2(g) (2)CO2(g) + H2(g) = CO(g) + H2O(l) (3)H2O(l) = H2O(g) (4)CoO(s) + H2(g) = Co(s) + H2O(g)