Question

For the reaction 2ch4(g)⇌c2h2(g)+3h2(g) k = 0.135 at 1615 ∘c . what is kp for the reaction at this temperature?

Answer 1

We can get Kp value from this formula:
Kp = Kc(RT)^Δn
when Kc= 0.135 
and R = 0.08206 L.atm/mol.K
and Δn = total number of moles of products - total number of moles of reactants
             = 1+3-2 = 2 
T= tempreature in kelvin = 1615 °C+273 =1888 K
so by substitution:

∴ Kp = 0.135 * (0.08206 * 1888)^2
         = 3240.4