Ice cubes at 0°C with a total mass of 645 g are put in a microwave oven and heated with 750. W (750. J/s) of energy for 6.00 minutes. What is the final temperature of the water from the melted ice? Assume all of the microwave energy is absorbed by the ice/water and no heat loss by the ice/water. The enthalpy of fusion for ice is 6.02 kJ/mol and the heat capacity for water is 4.18 J/g °C.
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
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