This table displays the vapour pressure of nitrogen at several
different temperatures.
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QUse the data to determine the heat of vaporization of nitrogen._________ kj mol-1 Determine the normal boiling point of nitrogen.______________k |
clasius-clepyron equation
ln(p2/p1) = DH0rxn/R[1/T1 - 1/T2]
P2 = 386.0 mbar, T2= 70 k
P1 = 174.0 mbar, T1 = 65 k
DHvap = x kj/mol
ln(386/174) = (x/(8.314*10^-3)((1/65)-(1/70)
DHvap = 6.03 kj/mol
boiling point of N2 (P2) = 1 atm = 1013.25 mbar
T2 = ?
P1 = 174 mbar , T1 = 65 k
DHvap = 6.03 kj/mol
ln(1013.25/174) = (6.03/(8.314*10^-3)((1/65)-(1/x)
x = T2 = boiling point of N2 = 77.2 k
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