The vapor pressure of the ethanol is calculated by remembering that the total pressure in the flask is the sum of the pressure of the air in the flask and the vapor pressure of the ethanol. Calculate the natural logarithm of the vapor pressures, In(P/PⓇ), where PⓇ is 100 kPa. Convert all your temperature readings to Kelvin. Calculate the inverse of the absolute temperatures. Prepare a graph (either by hand or in Excel) with In (P/P) plotted on the y-axis and 1/T (K-¹) plotted on the x- axis. Follow all the rules for properly preparing a scientific graph. Remember to turn in your graph with your report. Determine the line of best fit for your data. Calculate the slope of this line. From the slope calculate the enthalpy of vaporization.

The vapor pressure of the ethanol is calculated by remembering that the total pressure in the flask is the sum of the pressure of the air in the flask and the vapor pressure of the ethanol. Calculate the natural logarithm of the vapor pressures, In(P/PⓇ), where PⓇ is 100 kPa. Convert all your temperature readings to Kelvin. Calculate the inverse of the absolute temperatures. Prepare a graph (either by hand or in Excel) with In (P/P) plotted on the y-axis and 1/T (K-¹) plotted on the x- axis. Follow all the rules for properly preparing a scientific graph. Remember to turn in your graph with your report. Determine the line of best fit for your data. Calculate the slope of this line. From the slope calculate the enthalpy of vaporization.

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter12: Solutions

Section: Chapter Questions

Problem 12.106QE: In the 1986 Lake Nyos disaster (see the chapter introduction), an estimated 90 billion kilograms of...

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In the 1986 Lake Nyos disaster (see the chapter introduction), an estimated 90 billion kilograms of CO2 was dissolved in the lake at the time. (a) What volume of gas is this at standard temperature and pressure? (b) Assuming that this dissolved gas was in equilibrium with the normal partial pressure of CO2 in the atmosphere (0.038%, or 0.29 torr), use the Henrys law constant for CO2 in water to estimate the volume of Lake Nyos.
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