Problem 15.15 Write the expression for K c for the following reactions. In each

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Problem 15.15

Write the expression for Kc for the following reactions. In each case indicate whether the reaction is homogeneous or heterogeneous.

Part A

3NO(g)N2O(g)+NO2(g)

Kc=  

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Part B

3NO(g)N2O(g)+NO2(g)

reaction is

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Part C

CH4(g)+2H2S(g)CS2(g)+4H2(g)

Kc=  

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Part D

CH4(g)+2H2S(g)CS2(g)+4H2(g)

reaction is

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Part E

Ni(CO)4(g)Ni(s)+4CO(g)

Kc=  

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Part F

Ni(CO)4(g)Ni(s)+4CO(g)

reaction is

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Part G

HF(aq)H+(aq)+F(aq)

Kc=  

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Part H

HF(aq)H+(aq)+F(aq)

reaction is

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Part I

2Ag(s)+Zn2+(aq)2Ag+(aq)+Zn(s)

Kc=  

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Part J

2Ag(s)+Zn2+(aq)2Ag+(aq)+Zn(s)

reaction is

[N2O][NO2]3[NO] [NO]3[N2O][NO2] 3[NO][N2O][NO2] [N2O][NO2][NO]3

Explanation / Answer

part -A

3NO(g)N2O(g)+NO2(g)

Kc = [N2O][NO2]/[NO]3

part-B

3NO(g)N2O(g)+NO2(g)

Reactanta and products are same phase. So it is homogeneous

Part C

CH4(g)+2H2S(g)CS2(g)+4H2(g)

Kc= [CS2][H2]4/[CH4][H2S]2

Part D

CH4(g)+2H2S(g)CS2(g)+4H2(g)

reaction is homogeneous .Here reactants and products are same phase.

Part E

Ni(CO)4(g)Ni(s)+4CO(g)

Kc= [CO]4/[Ni(CO)4]

Part F

Ni(CO)4(g)Ni(s)+4CO(g)

reaction is heterogeneous because of reactants and products are different phase.

Part G

HF(aq)H+(aq)+F(aq)

Kc= [F-][H+]/[HF]

Part H

HF(aq)H+(aq)+F(aq)

reaction is homogeneous

Part I

2Ag(s)+Zn2+(aq)2Ag+(aq)+Zn(s)

Kc= [Ag+]2/[Zn+2]

Part J

2Ag(s)+Zn2+(aq)2Ag+(aq)+Zn(s)

reaction is hetreogeneous . Reactants and products are different phase

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