A chunk of aircraft aluminum with a mass of 0.975 g, initially at a temperature of 177 ºC, is placed into a beaker of water initially at 23.5 ºC. The aluminum and water are allowed to come to thermal equilibrium, at which point their temperature is 25.1 ºC. What volume (mL) of water was the aluminum placed into? Note: specific heat capacity of aluminum is 0.903 J/g ºC.
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 chunk of aircraft aluminum with a mass of 0.975 g, initially at a temperature of 177 ºC, is placed into a beaker of water initially at 23.5 ºC. The aluminum and water are allowed to come to thermal equilibrium, at which point their temperature is 25.1 ºC. What volume (mL) of water was the aluminum placed into? Note: specific heat capacity of aluminum is 0.903 J/g ºC.
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