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With this vapor pressure of water calculator, you can find the vapor pressure at a particular temperature according to five different formulas. This calculator works for the standard 0-100 °C range as well as temperatures above 100 °C and below the freezing point.
The vapor pressure of water is the pressure exerted by molecules of water vapor in gaseous form (whether pure or in a mixture with other gases such as air). The saturation vapor pressure is the pressure at which water vapor is in thermodynamic equilibrium with its condensed state.
The vapor pressure of water at room temperature (25 ° C) is 23.8 mm Hg, 0.0313 atm, or 23.8 torr, or 3.17 kPa. At its freezing point (0 ° C), the vapor pressure of water is 4.6 torr. At its boiling point (100 ° C), the vapor pressure of water is 658.0 torr (atmospheric pressure).
If the vapor pressure of water at 293 K is 17.5 mmHg, what is the vapor pressure of water at 300 K? Solution. Step 1: Use the Clausius Clapeyron equation (Equation \ref{CC}). Assume 293 K to be T 1 and 17.5 mmHg to be P 1 and 300 K to be T 2. We know the enthalpy of vaporization of water is 44000 J mol-1. Therefore we plug in everything we are ...
Online calculator, figures and tables with water saturation (vapor) pressure at temperatures ranging 0 to 370 °C (32 to 700°F) - in Imperial and SI Units.
A large number of saturation vapor pressure equations exists to calculate the pressure of water vapor over a surface of liquid water or ice. This is a brief overview of the most important equations used.
In your chemistry classes, a teacher might give you an exercise to find the vapor pressure or enthalpy of vaporization. Let's solve one to help you fully understand the Clausius-Clapeyron equation. Water has an enthalpy of vaporization of 40660 J / mol (ΔH vap). Its vapor pressure is 102325 Pa (P 1) at a temperature of 280 K (T 1).
Here’s how this article is structured: 1st Part: Water Saturation Pressure For Fahrenheit (°F) – Calculator, Example, Chart. Using this 1st calculator, you insert temperature in °F, and get the vapor pressure of water in terms of kPa, PSI, mmHg, Bar, atm, torr. We look at the 68°F example specifically.
The boiling point is defined as the temperature at which the saturated vapor pressure of a liquid is equal to the surrounding atmospheric pressure. For water, the vapor pressure reaches the standard sea level atmospheric pressure of 760 mmHg at 100°C.
The vapor pressure of a liquid is the equilibrium pressure of a vapor above its liquid (or solid); that is, the pressure of the vapor resulting from evaporation of a liquid (or solid) above a sample of the liquid (or solid) in a closed container.