Data and Calculated Results Run TiK TrK 32125 2Tuseo 100 340

Data and Calculated Results Run Ti(K) Tr(K) 321.25 2Tuseo 100 340.25 Sample calculation. Show how you calculated the molar enthalpy of fusion for your more accurate run. Final result. Enter your average value for the enthalpy of fusion in kJ moli to three significant digits and the percent error: kJ mol AfusHm Error

Solution

Using,

ln(V1/V2) = dHfus/R[1/T1 - 1/T2]

From Run 1

ln(100/180.20) = dHfus/8.314[1/331.25 - 1/276.55]

dHfus = 8.20 kJ/mol

From run 2

ln(100/179.30) = dHfus/8.314[1/340.25 - 1/276.85]

dHfus = 7.21 kJ/mol

% error = (8.20 - 7.21) x 100/8.21 = 12.06%