Given the following heats of formation (ΔH°f, 25°C)and heats of combustion (ΔH°c, 25°C) data, determine theheat of reaction for the liquid-phase esterification of lactic acid(C3H6O3) with ethanol(C2H5OH) to form ethyl lactate(C5H10O3) and liquid water at 25°Cand 1 atm.
C3H6O3 +C2H5OH -->C5H10O3 + H2O(liquid)
The table below shows the standard heat of combustion and heatof reaction.
Compound | ΔH°c (25°C, 1 atm) kJ/mol | ΔH°f (25°C, 1 atm) kJ/mol |
C3H6O3 | - | -687.0 |
C2H5OH | - | -277.6 |
C5H10O3 | -2685 | - |
H2O (liquid) | - | -285.8 |
CO2 (gas) | - | -393.5 |
O2 (gas) | - | 0 |
