The Clausius-Clapeyron Equation General Chemistry II with Lab | CHEM 1320, Lab Reports of Chemistry

Download The Clausius-Clapeyron Equation General Chemistry II with Lab | CHEM 1320 and more Lab Reports Chemistry in PDF only on Docsity! Name Lab Instructor Date Lab Section Chemistry 1320 Laboratory Winter 2007 Experiment Ten – The Clausius-Clapeyron Equation Relating the Temperature Dependence of the Vapor Pressure of Water to its Enthalpy of Vaporization Postlaboratory Questions 1.) Recall from the prelab the enthalpy of vaporization of isobutane. Isobutane is the fuel used in disposable lighters. The lighters’ operation is dependent upon the butane’s ability to vaporize and be ignited, and this depends somewhat upon the large pressure difference between the inside of the lighter and the atmospheric pressure outside the lighter. Assuming an atmospheric pressure of 1 atmosphere, how cold does it have to be to keep your lighter from working? (i.e. At what temperature is the pressure of butane equal to 1 atmosphere?) In case you’ve forgotten the value of ΔHvap, at 27 °C the vapor pressure of isobutane is 22,775 torr and at -3 °C it is 1050 torr, so you can figure it out again.