Vapor Pressure Calculator
To find vapor pressure, multiply the mole fraction of the solvent by its pure vapor pressure.
This calculator helps you find the vapor pressure of a solution. Vapor pressure is the force exerted by a liquid’s molecules as they turn into gas. It depends on the solvent, temperature, and solute concentration.
This tool is useful for students, chemists, and engineers working with solutions, evaporation, and atmospheric science. Instead of solving equations by hand, just enter the values, and the calculator will give the answer instantly.
Formula:
The formula for vapor pressure is:
| Symbol | Meaning |
|---|---|
| VP(solution) | Vapor Pressure of Solution (torr, atm, or kPa) |
| MF | Mole Fraction of Solvent |
| VP(solvent) | Vapor Pressure of Pure Solvent (torr, atm, or kPa) |
What is Vapor Pressure?
Vapor pressure tells us how easily a liquid turns into gas. A higher vapor pressure means a liquid evaporates quickly, like alcohol or gasoline. A lower vapor pressure means a liquid evaporates slowly, like water or oil.
For example, when water is heated, its molecules move faster, and the vapor pressure increases, making it boil. This principle is important in chemistry, weather forecasting, and industrial processes like fuel storage and distillation.
Understanding vapor pressure helps in calculating boiling points, humidity, and solvent behavior in different conditions.
Final Words:
To sum up, vapor pressure depends on temperature and solution composition. This calculator makes it quick and easy to find vapor pressure in chemistry, physics, and engineering applications.
FAQs:
1. How do you calculate vapor pressure?
Use the formula: VP(solution) = MF × VP(solvent), where MF is the mole fraction of the solvent.
2. What is true vapor pressure?
It is the actual pressure of evaporating molecules at a given temperature, often used in fuel and gas calculations.
3. How to find total vapor pressure?
Total vapor pressure is the sum of all partial vapor pressures in a mixture, following Raoult’s Law.