# How can I find the equilibrium constant Kp without temperature?

The question I'm looking at is

I found that that Kc = 139M^-1, but how can I determine Kp? There is no temperature given, but I was told that it is still possible to calculate.

• Why do you think you need the temperature in this case to calculate $K_p$? – a-cyclohexane-molecule Nov 10 '18 at 13:17
• HINT - Assume ideal gas behavior. – MaxW Nov 10 '18 at 13:58

$$K_p=K_c(RT)^{\Delta n_g}$$(try to prove this yourself) where $$\Delta n_g$$ is number of gaseous products -Number of gaseous reactants.
In your question, $$\Delta n_g=0$$ so $$K_p=K_c=2.43$$