Homework Answers
We need to plot lnK on y axis and 1/T on x axis
K = 3.04
ln K = ln (3.04) = 1.11186
T = 275.0
1/T = 0.00364
point 1 is:
x = 0.00364
y = 1.11186
K = 5.57
ln K = ln (5.57) = 1.7174
T = 675.0
1/T = 0.00148
point 2 is:
x = 0.00148
y = 1.7174
----------------------------------------------------------------------------
rise = (y1-y2) = 1.11186 - 1.7174 = -0.60554
rise = (X1-X2) = 0.00364 - 0.00148 = 0.00215
slope = rise/run
= -0.60554/0.00215
= -281.00726
----------------------------------------------------------------------------
use
slope = - Ho/R
-281.00726 = -Ho/8.314
Ho = 2336 J/mol
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