CHE112H1 Midterm: CHE112H1F_2017_PHYSICALCHEMISTRY_E

• School: UTSG
• Department: Chemical Engineering and Applied Chemistry
• Course: CHE112H1
• Professor: All

Document Summary

Calculator: u oft_approved (casio fx-991 or sharp el-520) Exam type: c (one 8 x 11 inch u of t approved aid sheet) Normal boiling point pressure= 1 atm; standard boilng point pressure=l bar. R = 8. 314 j mol 1 k-1 = 0. 08206 l atm mol-1 k-1. For water: kr= 1. 86 k (mol/kg)-1; kii = 0. 513 k (molfkg) 1. 1 atm = 101 325 pa= 760 torr= 1. 01325 bar; 1 g/cm3 = 1000 kg/m3. 1 cal = 4. 184 j; 1 mol/m3 = 1. 0 x 10 3 mol/l. A solution of benzene (cghg, molar mass= 78. 11 g mol-1) and toluene (cghsch3, molar mass= 92. 13 g mol-1) is 50. 0% by mass benzene. Calculate the composition of the vapour in equilibrium with the solution at 50 c. At 50 c, the vapour pressures of benzene and toluene are 36. 1 kpa and 12. 3 kpa, respectively. : (7 marks)