Wanting to make your own ice cream at home, you purchase milk, ice, and salt (MW 58.44 g/mol). You grab 708 mL of milk, which freezes at -0.547 °C, and place it inside a Ziplock bag. You then place this bag in a home-made ice bath filled with 5 kg of ice. What is the minimum amount of salt (in grams) you should add to the ice to freeze the milk? =
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.
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