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:
R = gas constant = 0.08206 (L∙atm)/(mol∙K)
T = temperature, K
Δn = moles of gas products – moles of gas reactants
Under which circumstances are Kp and Kc equal for the reaction aA(g) + bB(g) ⇌ cC(g) + dD(g)?
a. If a + b = c + d
b. If the reaction is irreversible.
c. The equilibrium constant is small.
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