4. What is the minimum amount of ice at 0°C that must be added to the contents of a can of diet cola (340mL) to cool it down from 20.5°C to 0°C? Assume that the specific heat and density of the diet cola are the same as for water and that no heat is gained or lost to the surroundings. The latent heat of fusion of ice is 335J/g. Specific Heat of water 4.184 J/g.K, and Density of water is 1 g/mL.
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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