Kp Calculator
Calculate the gas phase equilibrium constant (Kp) using the liquid concentration constant (Kc) and temperature.
Calculation Parameters
Adjust the values below.
Calculated Result
Expert Tip
Ensure units are correctly formatted (e.g. Kelvin for gas temperatures and liters for volumes) to get chemically accurate outputs.
How this Calculator Works
This calculator allows you to solve Kp problems dynamically. Adjust the input parameters using the sliders or selection menu below:
- Equilibrium Constant (Kc) (Range: 0.01 to 100.00, Default: 1.00)
- Temperature (T, °C) (Range: 0 to 500, Default: 25)
- Reactant Moles of Gas (Range: 1 to 5, Default: 2)
- Product Moles of Gas (Range: 1 to 5, Default: 2)
The results are computed instantly and updated in the results panel on the right.
Formula & Methodology
where R = 0.08206 L*atm/(mol*K), T is in Kelvin, and Δn = Product Moles - Reactant Moles
Where:
- Equilibrium Constant: Parameter value.
- Temperature: Parameter value.
- Reactant Moles of Gas: Parameter value.
- Product Moles of Gas: Parameter value.
Step-by-Step Calculation Example
To calculate Kp manually, follow these steps:
- Identify the input parameters. For example:
- Equilibrium Constant (Kc) = 1.00
- Temperature (T, °C) = 25
- Reactant Moles of Gas = 2
- Product Moles of Gas = 2
- Apply the formula:
Kp = Kc * (R * T)^Δn
where R = 0.08206 L*atm/(mol*K), T is in Kelvin, and Δn = Product Moles - Reactant Moles - Verify the calculated value which is updated instantly in the results panel on the right.
Frequently Asked Questions
What is Kp in chemical equilibrium? ▼
Kp is the equilibrium constant expressed using partial pressures of gaseous reactants and products.
How do you convert between Kp and Kc? ▼
Kp = Kc × (R × T)^(Δn), where Δn is moles of gaseous products minus moles of gaseous reactants.
When are Kp and Kc equal? ▼
Kp equals Kc when Δn = 0 (the total moles of gas on reactant and product sides are equal).