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Working with heat of vaporization

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I have attached the graphs. I don't think the first one is useful, but i needed to plot the data and find the heat of vaporization. Hence, the reason for the second graph. I know that the slope is equal to the heat of vaporization/RT but I don't think I am getting the right answer.

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Solution Summary

The heat of vaporization are analyzed. The slope which is equal to heat of vaporization are given. The solution explains each step and provides all mathematical steps.

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Convert the temperarure values to Kelvin by the addition of 273. take ln of the vapor pressure values and plot. ...

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