A 25.0 g sample of an alloy metal was heated to 100.0°C and dropped into a beaker containing 90.0 g of water at 25.32°C. The temperature of water rose to a final value of 27.18°C. Neglecting heat losses to the room and the heat capacity of the beaker itself, what is the specific heat capacity in cal/gCo of the alloy metal?
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.
2. A 25.0 g sample of an alloy metal was heated to 100.0°C and dropped into a beaker containing 90.0 g of water at 25.32°C. The temperature of water rose to a final value of 27.18°C. Neglecting heat losses to the room and the heat capacity of the beaker itself, what is the specific heat capacity in cal/gCo of the alloy metal? Draw the illustration.
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