You fill the calorimeter with 55.5g of water at 16.5°C, heat the 15.5 g “silver” coin to 100.0°C, and drop it in to observe the change in temperature. The final temperature in the calorimeter reads 22.0 °C. a)If the specific heat of silver is known to be 0.240 J/g°C, do your findings support or refute your friend’s claim
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.
A friend of yours receives a bag of rare coins for their birthday and boasts that one of the coins is pure silver. You decide to test this theory by conducting a simple experiment in which you construct a coffee cup calorimeter. You fill the calorimeter with 55.5g of water at 16.5°C, heat the 15.5 g “silver” coin to 100.0°C, and drop it in to observe the change in temperature. The final temperature in the calorimeter reads 22.0 °C.
a)If the specific heat of silver is known to be 0.240 J/g°C, do your findings support or refute your friend’s claim? Support your answer with a calculation.
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