measure the partial pressures of the reactants and products rather than the molar concentration. that case K_{p} values are obtained. Calculate the K_{p} for the above reaction at 702 °C from the following pressure data:

Since you did not post the equation, I can only help you in general terms, because I have no idea which is the product(s) and which compound is the reactants. The formula for finding K sub p is as follows:

Ksub p = the partial pressure of the products /the partial pressure of the reactants. If you post the balanced equation, I will be happy to help you further. If this is helpful, please best this answer. Thanks!