Question

O KINETICS AND EQUILIBRIUM Writing a pressure equilibrium constant expression Sulfur trioxide decomposes to form sulfur dioxide and oxygen, like this: 2 SO 3(9)+2 SO 2(9)+02(9) Write the pressure equilibrium constant expression for this reaction. X ?

Answer 1

K​​​​​​p is the equilibrium constant calculated from the partial pressures of a reaction equation. It is used to express the relationship between product pressures and reactant pressures.

Consider this general equation for a gas-phase reaction: aA + bB = cC + dD

The formula uses the partial pressures, P​​​​​​A, P​​​​​​B, P​​​​​C, and P​​​​​​D, raised to exponents equal to their respective coefficients in the chemical equation. Kp is calculated as follows:

Here,