QUESTION 1 The following data are collected for the vapor pressure of cyclohexan

Question

QUESTION 1 The following data are collected for the vapor pressure of cyclohexane. Use the data given to complete the table below. rightT(K p (mm Hp 2.0 106 21.0 64 34.0 15 146 190 238 QUESTION 2 A graph of in(p) vs 1/T constructed using the data from the previous problem is shown below. The equation of the best-fit line is also shown. What are the units on the slope of the line? Claussius-Clapeyron Equation -3975.7x 18.35 45 3.5 0.0032 60013 00011 0.0035 00096 0.000 aania QUESTION3 Based on the results shown in the above graph, and a value of R·0.314 Jm0K calculate the enthalpy of vaporization for cydte ane.

Explanation / Answer

2. From graph,

units of slope = K i. e option 'a'

3. Claussius Clapeyron eqn,

lnP = constant - delta.Hvap/ RT

Comparing with eqn of line y = mx+c

slope = m = - delta. Hvap/R = - 3975.7 ( y = lnP and x = 1/T )

delta.Hvap = 8.314 x 3975.7 = 33.05 kJ/mol

Thank you

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