Print Calculator-Periodic Table Question 14 of 36 Sapling Learning Map The vapor

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Print Calculator-Periodic Table Question 14 of 36 Sapling Learning Map The vapor pressure, P, of a certain liquid was measured at two temperatures, T. If you were going to graphically determine the enthalpy of vaporizaton, dHvap, for this liquid, what points would you plot? The data is shown in this table. Number Number T(K) P (kPa) 225 3.79 725 6.58 To avoid rounding errors, use three significant figures in the x values and four significant figures in the y values point 1: 0.004444 1.1442 Number Number NOTE: Keep the pressure units in kPa. point 2: Determine the rise, run, and slope of the line formed by these points. rise run slope Number Number Number There is a hint available vaporization of this liquid? bottom divider bar on the divider bar again to hide the hint. Close J/ mol Previous Give Up & View Solution e Check Answer Next tl Exit Hint

Explanation / Answer

We need to plot lnK on y axis and 1/T on x axis

P = 3.79

ln P = ln (3.79) = 1.33237

T = 225.0

1/T = 0.00444

point 1 is:

x = 0.00444

y = 1.33237

P = 6.58

ln P = ln (6.58) = 1.88403

T = 725.0

1/T = 0.00138

point 2 is:

x = 0.00138

y = 1.88403

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rise = (y1-y2) = 1.33237 - 1.88403 = -0.55167

rise = (X1-X2) = 0.00444 - 0.00138 = 0.00307

slope = rise/run

= -0.55167/0.00307

= -179.98192

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use

slope = - Hvap/R

= -179.98192 = -Ea/8.314

Hvap = 1496.3697 J/mol

Answer: 1496.4 J/mol

Feel free to comment below if you have any doubts or if this answer do not work. I will correct it and submit again if you let me know

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