Please give an example of how to calculate Kp for reverse reaction? and How do y
ID: 728245 • Letter: P
Question
Please give an example of how to calculate Kp for reverse reaction? and How do you convert Kp to any other equation? like Kq and etc? sorry if it's hard to understand what I'm asking...Explanation / Answer
example In the gas phase reaction N2 + 3 H2 ? 2 NH3 At T = 298 Kelvin , Kp = 560000 atm-2 Calculate Kp, T = 298 Kelvin , for the following reaction 4 NH3 ? 2 N2 + 6 H2 . solution for the Rxn #1 : N2 + 3 H2 ? 2 NH3 Kp1 = [NH3]2 / [N2] [H2]3 Kp1 = 5.6e5 (given) then when solving for the Kp for the reverse reaction #2 : 2 NH3 --> N2 + 3 H2 Kp2 = [N2] [H2]3 / [NH3]2 "reverse is inverse" the reverse reaction has the inverse Kp Kp2 = 1/Kp = 1/ 5.6e5 = 1.786e-6 ============================ the if reaction #2 : 2 NH3 --> N2 + 3 H2 has a Kp2 = [N2] [H2]3 / [NH3]2 then reaction #3 : 4 NH3 ? 2 N2 + 6 H2 has a Kp3 = [N2]2 [H2]6 / [NH34] by doubling everything in the equation ... it exponentially squares every [ ], ... & thus squares the outcome... therefor the Kp3 of [N2]2 [H2]6 / [NH3]4 is the square of the Kp2 of [N2] [H2]3 / [NH3]2 Kp3 = (Kp2) squared = (1.786e-6)2 = 3.189e-12