Calculadora de Kp

The Kp Calculator converts the equilibrium constant in terms of concentration (Kc) to the constant in terms of partial pressure (Kp) for gaseous reactions. The formula used is Kp = Kc × (RT)^Δn, where R is the gas constant (8.314 J/(mol·K)), T is the temperature in Kelvin, and Δn is the change in moles of gas (moles of gaseous products minus moles of gaseous reactants). This tool is useful for chemists and students who need to relate equilibrium constants under different conditions.

To use the calculator, enter the Kc value, temperature in Kelvin, and Δn calculated from the balanced equation. The result is the corresponding Kp, which helps predict equilibrium shifts based on partial pressures. It is important to note that the formula applies only to reactions involving at least one gas. If there is no change in the number of gas moles (Δn = 0), then Kp = Kc.

This calculator is ideal for solving chemical equilibrium problems in physical chemistry and general chemistry courses. For instance, when studying ammonia synthesis (N2 + 3H2 ⇌ 2NH3), Δn = 2 - 4 = -2, and the calculator assists in converting between Kc and Kp. Caution: ensure that Kc units are in mol/L and temperature is in Kelvin to avoid numerical errors.