A 20.0g sample of quartz, which has a specific heat capacity of 0.730·J·g−1°C−1 , is dropped into an insulated container containing 200.0g of water at 25.0°C and a constant pressure of 1atm . The initial temperature of the quartz is 95.2°C . Assuming no heat is absorbed from or by the container, or the surroundings, calculate the equilibrium temperature of the water.
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
sample of quartz, which has a specific heat capacity of
, is dropped into an insulated container containing
of water at
and a constant pressure of
. The initial temperature of the quartz is
.
Assuming no heat is absorbed from or by the container, or the surroundings, calculate the equilibrium temperature of the water. Be sure your answer has the correct number of significant digits.
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°C
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