If you drop a 150 gram piece of metal that has a temperature of 125 Celsius into 1000 grams of water at 20 Celsius, what best describes what would occur? More heat will be lost by the metal than gained by the water. The temperature of the water will be greater than the amount of heat lost by the metal. The temperature change of the metal will equal the temperature change of the water. The heat lost by the metal will equal the heat gained by 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.
If you drop a 150 gram piece of metal that has a temperature of 125 Celsius into 1000 grams of water at 20 Celsius, what best describes what would occur?
- More heat will be lost by the metal than gained by the water.
- The temperature of the water will be greater than the amount of heat lost by the metal.
- The temperature change of the metal will equal the temperature change of the water.
- The heat lost by the metal will equal the heat gained by the water.
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