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.
![d Morris-Practice Exam-Solutions & Thermochem
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Russo One
PA 24.6 gram iron nail (c-0.42 J/g-C), starting at 13°C is heated to a temperature of 664 C How ma
joules were needed to do this?
A sample of penguinium (m-24.5 grams) is exposed to 133 joules and its temperature rises from 12
to 355 C What is its specific heat capacity?
A 84.5 gram sample of speedskatium (c=0.266 J/g-°C) is heated with 499 Joules. If its starting
temperature is 21°C, what will its final temperature be?
10. How many grams of water (c=4.18 J/g-°C) can be taken from 4°C to 97°C it 2193 Joules are used?
11. A 33.54 gram steel nail (c=0.41 J/g-°C) is heated until it glows. It is then dropped into a cup with 103
grams of water (c=4.18 J/g-°C) at a temperature of 5.9°C. If the water and steel reach an equilibrium](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F24bf2450-39e8-47a2-b6d3-2df49a54adbe%2F602906fd-f2c2-4de6-b5a4-6cdaf164d6b0%2Ffsdwke_processed.jpeg&w=3840&q=75)
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