12.已知:Fe2O3(s) + C(s) = CO2 ΔΗ=234.1 kJ·mol-1 C(s) + O2(g) = CO2(g) ΔΗ=-393.5 kJ·mol-1 则2 Fe(s)+ O2(g) = Fe2O3(s) 的ΔΗ 是 A.-824.4 kJ·mol-1 B.-627.6 kJ·mol-1 C.-744.7 kJ·mol-1 D.-169.4 kJ·mol-1 答案A [解析]+ O2(g) = Fe2O3(s).则ΔΗ=ΔΗ2-ΔΗ1=-824.4 kJ·mol-1. 第Ⅱ卷 本卷包括必考题和选考题两部分.第13题-第17题为必考题.每个试题考生都必须做答.第18题-第20题为选考题.考生根据要求做答. 查看更多

 

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已知:Fe2O3(s) + C(s) = CO2(g) + 2 Fe(s)   ΔΗ=234.1 kJ?mol-1

          C(s) + O2(g) = CO2(g)                   ΔΗ=-393.5 kJ?mol-1

  则2 Fe(s)+ O2(g) = Fe2O3(s) 的ΔΗ

A.-824.4 kJ?mol-1             B.-627.6 kJ?mol-1

C.-744.7 kJ?mol-1             D.-169.4 kJ?mol-1

 

 

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已知:Fe2O3(s) + C(s) = CO2(g) + 2 Fe(s)   ΔΗ=234.1 kJ?mol-1

          C(s) + O2(g) = CO2(g)                   ΔΗ=-393.5 kJ?mol-1

  则2 Fe(s)+ O2(g) = Fe2O3(s) 的ΔΗ

A.-824.4 kJ?mol-1             B.-627.6 kJ?mol-1

C.-744.7 kJ?mol-1             D.-169.4 kJ?mol-1

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已知:Fe2O3(s) + C(s) = CO2(g) + 2 Fe(s)   ΔΗ=234.1 kJ·mol-1

          C(s) + O2(g) = CO2(g)                   ΔΗ=-393.5 kJ·mol-1

  则2 Fe(s)+ O2(g) = Fe2O3(s) 的ΔΗ

A.-824.4 kJ·mol-1             B.-627.6 kJ·mol-1

C.-744.7 kJ·mol-1             D.-169.4 kJ·mol-1

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已知:Fe2O3(s) + C(s) = CO2(g) + 2 Fe(s)  ΔΗ="+234.1" kJ·mol-1
C(s) + O2(g) = CO2(g)                  ΔΗ="-393.5" kJ·mol-1
则2 Fe(s)+ O2(g) = Fe2O3(s) 的ΔΗ是:

A.-169.4kJ·mol-1B.-627.6 kJ·mol-1
C.-744.7 kJ·mol-1D.-824.4 kJ·mol-1

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已知:Fe2O3(s) + C(s) = CO2(g) + 2 Fe(s)  ΔΗ="+234.1" kJ·mol-1

C(s) + O2(g) = CO2(g)                  ΔΗ="-393.5" kJ·mol-1

则2 Fe(s)+ O2(g) = Fe2O3(s) 的ΔΗ是:

A.-169.4kJ·mol-1                         B.-627.6 kJ·mol-1

C.-744.7 kJ·mol-1                        D.-824.4 kJ·mol-1

 

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