# Essay on Vapor Pressure and Enthalpy of Vaporization of Water

Words: 893
Pages: 4

Vapor Pressure and Enthalpy of Vaporization of Water
1/9/12
Emily Toy
Lab Partner: Zack Ronnei
Instructor: Ms. Olsen, AP Chemistry
Purpose: The purpose of this lab is to find the vapor pressure of water at temperatures between 50oC and 80oC.

Procedure: 1. Take a10 mL graduated cylinder and fill it with 7 mL of water. 2. Next fill a 1000 mL beaker ¾ full with water. 3. Cover the graduated cylinder by putting your finger on top and place the cylinder in the 1000 mL beaker. Make sure the graduated cylinder is under the surface of the water. 4. Measure the difference between the height of the water in the graduated cylinder and the height of the water in the beaker. 5. Record the barometric pressure. 6. Heat the
Table of vapor pressure of water at each temperature. Ex: 774.16-121.7= 652.46

|Temperature (oC) |Partial Pressure of H2O (mmHg) |
|80 |652.46 |
|75 |650.56 |
|70 |645.96 |
|65 |643.66 |

6. Graph on