A pure gold ring and pure silver ring have a total mass of 14.9 g.We heat the two rings to 62.0°C and drop them into 15.0 mL ofwater at 23.5°C. When equilibrium is reached, the temperatureof the water is 25.0°C. What is the mass of each ring? (Assume adensity of 0.998 g/mL for 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 pure gold ring and pure silver ring have a total mass of 14.9 g.
We heat the two rings to 62.0°C and drop them into 15.0 mL of
water at 23.5°C. When equilibrium is reached, the temperature
of the water is 25.0°C. What is the mass of each ring? (Assume a
density of 0.998 g/mL for water.)
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