A metal pellet with a mass of 100.0 g, originally at 116°C, is dropped into a cup of water, initially at 23.8°C. The final temperature is 46.3°C. What is the mass of the water in the cup? The specific heat of water is 4.184 J/g·°C. The specific heat of the pellet is 0.568 J/g·°C. Group of answer choices 56 g 48 g 100 g 42 g 0.02 g
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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