A piece of metal with a mass of 125 g was heated in a flame and then dropped into a container containing 500.0 g of water at 26.5oC. The temperature of the water increased to 34.1oC. Specific heat of the metal = 0.900 J/goC & Specific heat of water = 4.184 J/go C How much heat was absorbed by the water? How much heat was released by the metal? Calculate the temperature of the metal when it was first removed from the flame.
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 piece of metal with a mass of 125 g was heated in a flame and then dropped into a container containing 500.0 g of water at 26.5oC. The temperature of the water increased to 34.1oC.
Specific heat of the metal = 0.900 J/goC & Specific heat of water = 4.184 J/go C
How much heat was absorbed by the water?
How much heat was released by the metal?
Calculate the temperature of the metal when it was first removed from the flame.
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