A chunk of platinum weighing 19.36 grams and originally at 98.22 °C is dropped into an insulated cup containing 77.94 grams of water at 21.09 °C. Thermometer Water Metal sample Stirring rod
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 platinum weighing 19.36 grams and
originally at 98.22 °C is dropped into an
insulated cup containing 77.94 grams of water
at 21.09 °C.
Thermometer
Water
Metal-
sample
Stirring rod
The heat capacity of the calorimeter
(sometimes referred to as the calorimeter
constant) was determined in a separate
experiment to be 1.72 J/°C.
Using the accepted value for the specific heat
of platinum (See the References tool), calculate
the final temperature of the water. Assume
that no heat is lost to the surroundings.
Tfinal =
°℃](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe7de08bf-3c0b-4e44-a9bb-97086f9a0719%2Fe24b873c-06cd-4b55-8617-454b259fac0a%2F46sd0dg_processed.jpeg&w=3840&q=75)
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