Stoichiometric equation of neutralization of oleic acid:

R-COOH + NaOH ------> R-COONa + H2O

a) Does the chemical reaction absorb or release energy? Consider: Hf : R-COOH = -711 kJ/mol; NaOH = 426kJ/mol; R-COONa = 60 kJ/kg; H2O = -285.83 kJ/mol

b) If the neutralization reaction is required to be carried out at 80C, at what temperature should the oil enter?

c) If the oil is at an initial temperature of 20C in the storage tank, and is heated by water through a heat exchanger that enters at 90C and leaves it at 80C. It is requested to determine the mass flow value of the water, and the length value of the tubular exchanger if the diameter is 0.04 m. Assume a value U = 600 W/m2 K. The oil must be heated prior to entering neutralization.

Cp water: 4.18 kJ/kg/K Cp oil: 1,634 kJ/kg/K