8. Thermochemistry
Internal Energy
32PRACTICE PROBLEM
Calculate q, w, ΔU, and ΔH for the evaporation of 350 g ethanol (ΔHvap = 38.6 kJ/mol) at 352 K.
Calculate q, w, ΔU, and ΔH for the evaporation of 350 g ethanol (ΔHvap = 38.6 kJ/mol) at 352 K.
ANSWERS OPTIONS
A
q = 292.25 kJ; w = –22.23 kJ; ΔU = 271.01 kJ; ΔH = 292.25 kJ
B
q = 262.01 kJ; w = –31.11 kJ; ΔU = 230.90 kJ; ΔH = –31.11 kJ
C
q = 212.68 kJ; w = 51.11 kJ; ΔU = 263.79 kJ; ΔH = 263.79 kJ
D
q = 248.16 kJ; w = 0 kJ; ΔU = 248.16 kJ; ΔH = 378.26 kJ