A. You transfer a steel ball bearing weighing 35 g (specific heat = 0.12 cal/g°C) from your boiling water bath to your calorimeter that contains 50 g of 25°C water. To what temperature do you expect the water in the calorimeter to rise? B. What is the mass of a piece of quartz rock that you heat in a 300°F oven, then transfer to your calorimeter, raising the temperature of 75 g of 70°F water to 108°F? (The specific heat of quartz is 0.17 cal/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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