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For an equilibrium reaction, Kc and Kp are related by the relation Kp = Kc*(R*T)^D where D is the number of moles of gaseous products - number of moles of gaseous reactants and R is the gas constant.
Here, Kc = 6.96*10^-5 at 300 K
The value of R is 0.0821; this has to be chosen appropriately for the units that the partial pressure of the gases and the temperature is expressed in.
Kp = Kc*(R*T)^(2 - 0)
The value of Kp is equal to 4.222*10^-2
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