Vapor pressure of liquids lablance schell, colin livasy, and erin tatmanpark hill south high schoolblock one advanced placement (ap) chemistryjanuary 9, 2009. Heat of vaporization experiment factors including temperature and intermolecular forces that influence equilibrium vapor pressure can be explained. Essays - largest database of quality sample essays and research papers on vapor pressure and enthalpy lab. Vapor pressure or equilibrium vapor pressure is defined as the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at.
Vapor pressure and molecular weight of a pure liquid purpose the purpose of this lab is to measure the enthalpy and entropy of vaporization of n-pentane. Vapor pressure and heat of vaporization when a sample of a liquid is introduced into a container, the liquid will tend to evaporate molecules will escape from the. Ap chemistry lab determining enthalpy of vaporization using vapor pressure objective-to determine the enthalpy of vaporization of water using the clausius-clapeyron.
The vapor pressure of a liquid is related to its heat of boiling—transition from liquid vapor is called the enthalpy of: vaporization, hvap—boiling. How to calculate vapor pressure δh vap (the enthalpy of vaporization), however, depends on the substance whose vapor pressure you are examining. Purpose: the purpose of this lab is to determine the vapor pressure of water using the clausius-clapeyron equation background: a sample of air i. This is the clausius-clapeyron equation, which gives us a way of ﬁnding the heat of vaporization, expands, and the vapor pressure of the water increases.
Jack lawson and chris horn in the old style prelab video. Determine the enthalpy be sure there are no open flames in the lab during this where p is vapor pressure,. Answer to vapor pressure and heat of vaporization lab report: provide a brief statement of the purpose of this activity be sure t. It is possible to determine the vapor pressure of water using only a tall beaker, a graduated cylinder, and a thermometer.
It is possible to estimate the heat of vaporization by measuring the vapor pressure of water vapor in safety goggles must be worn at all times in the lab. Vapor pressure and the heat of vaporization by your lab instructor the vapor pressure of the liquid at temperature t in kelvins. Vapor pressure and the enthalpy of vaporization introduction when a volatile liquid is placed into a container it starts to evaporate if the container is left open. The purpose of this experiment is to determine the enthalpy of vaporization of water by taking note of the vapor pressure of water over many.
• goals of lab • schematic of experimental setup • pressure-enthalpy diagram for r -12 • pressure-enthalpy table for r -12 • vapor compression refrigeration. Vapor pressure of a pure liquid author: j m mccormick last update: fevruary 1, 2013 introduction in this exercise you will determine the enthalpy of. Vapor pressure and enthalpy of vaporization of water kyle miller november 19, 2006 1 purpose the purpose of this experiment is to calculate the enthalpy of.
The enthalpy of vaporization is often quoted for the normal boiling temperature of the substance the liquid and vapor phases are the enthalpy of. Vapor pressure basic introduction, normal boiling point, & clausius clapeyron equation - chemistry - duration: 39:43 the organic chemistry tutor 16,887. Find the clausius-clapeyron constant for your liquid in a data table or from separate experiments that measure vapor pressure at different temperatures.