Was moasumed at two temiperatinen , tu.dayounzatre 3pontr th, wat pints wouo The
ID: 589841 • Letter: W
Question
Was moasumed at two temiperatinen , tu.dayounzatre 3pontr th, wat pints wouo The vapor pressure, P, of a certain liquid was measured at two temperatures vaporizaton_aHap, for this liquid, what points would you plot? The data is shown in this table Number Number T (K) P (kPa) 325 3.97 725 5.02 To avoid rounding errors, use three significant figures in the x values and four significant figures in the y values. point 1 Number Number NOTE: Keep the pressure units in kPa. point 2 Determine the rise, run, and slope of the line formed by these points ise run slope Number Number Number What is the enthalpy of vaporization of this liquid? Number J/ molExplanation / Answer
We need to plot lnK on y axis and 1/T on x axis
P = 3.97
ln P = ln (3.97) = 1.37877
T = 325.0
1/T = 0.00308
point 1 is:
x = 0.00308
y = 1.37877
P = 5.02
ln P = ln (5.02) = 1.61343
T = 725.0
1/T = 0.00138
point 2 is:
x = 0.00138
y = 1.61343
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rise = (y1-y2) = 1.37877 - 1.61343 = -0.23466
rise = (X1-X2) = 0.00308 - 0.00138 = 0.0017
slope = rise/run
= -0.23466/0.0017
= -138.23167
----------------------------------------------------------------------------
use
slope = - delltaHo/R
= -138.23167 = -delltaHo/8.314
delltaHo = 1149 J/mol
Feel free to comment below if you have any doubts or if this answer do not work. I will edit it if you let me know
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