Asked by Hannah

The vapor pressure of the liquid HF is measured at different temperatures. The following vapor pressure data are obtained.

Temperature(K) Pressure mmHg
250 129.63
260 206.65
270 318.22
280 475.16

Determine the enthalpy of vaporization.

I have know idea how to start this. Thank you for your help.
Answered by DrBob222
You are supposed to plot ln p vs 1/T. You will get a straight line with a negative slope. The slope = dHvap/R.
Answered by Hannah
Ok when I did the graph I got -2.99e3 as the slope. Is this the answer or do I have to do something else now?
Answered by Hannah
Nevermind I actually figured it out. Thank you.
Answered by this hoe
well i would really help u hannah if i knew how to do it
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