Problem: Which of the following reactions does Kp=Kc?a. 2 Na2O2(s) + 2 CO2(g) → 2 Na2Co3(s) + O2(g)b. Fe2O3(s) + CO(g) → 2 Fe(s) + 3 CO2(g)c. NH3NO3(s) → N2O(g) + 2 H2O(g)

FREE Expert Solution

When dealing with equilibrium:

Kc → equilibrium units are in molarity 
Kp → equilibrium units in terms of pressure


Kp and Kc are related to one another by the following equation below: 

Kp=KcRTn


R = gas constant = 0.08206 (Latm)/(molK)
T = temperature, K
Δn = moles of gas products – moles of gas reactants


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Problem Details

Which of the following reactions does Kp=Kc?

a. 2 Na2O2(s) + 2 CO2(g) → 2 Na2Co3(s) + O2(g)

b. Fe2O3(s) + CO(g) → 2 Fe(s) + 3 CO2(g)

c. NH3NO3(s) → N2O(g) + 2 H2O(g)

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