What are the expressions for the equilibrium C instants? CaCO_3(s) doubleheadarr

Question

What are the expressions for the equilibrium C instants? CaCO_3(s) doubleheadarrow CaO(s) + CO_2(g) K_eg = [CaO][CO_2] [CaCO_3] K_eg = [CO_2] K_eg = 1/[CO_2] 2CO_2(g) doubleheadarrow 2CO_(g) + O_2(g) K_eg = [CO_2]^-2/[CO]^2[O_2] K_eg = [CO]^2[O_2]/[CO_2]^2 K_eg = [CO][O_2]/[CO_2] H_2(g) + I_2(g) doubleheadarrow 2HI_(g) K_eg = [HI]^2/[H_2] K_eg = 1/[I_2][H_2] K_eg = [HI]/[I_2][H_2] 2H_2(g) + O_2(g) doubleheadarrow 2H_2O_(2) K_eg = 1/P^2H_2P_0_2 K_eg = P^2 H_2 P_0_2 K_eg = P_H_8O/PH_2P_0_2 If the reaction quotient is greater than the equilibrium constant, which statement would be correct? If Q > k, then the reaction is at equilibrium If Q > k, then the reaction needs to proceed toward the left to reach equilibrium. At a certain temp, T, the value of keg for the following reaction is 1.0 times 10^-30 2NO_(g) doublheadarrow N_2(g) + O_2(g) The reaction mixture contains mostly NO The reaction mixture contains mostly N_2 + O_2

Explanation / Answer

1)
solid and liquid phase are not considered in equilibrium constant expression
so,
kc = [CO2]
Answer: b

2)
Kc = concentration of product / concentration of reactant
Kc = [CO]^2 [O2] /[CO2]^2
Answer:b

3)
solid in not considered in keq
answer: a

4)
Answer: a

I am allowed to answer only 1 question at a time

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