I Review | Constants Periodic Table Part A The density of liquid oxygen at its boiling point is 1.14 kg/L , and its heat of vaporization is 213 kJ/kg . How much energy in joules would be absorbed by 4.0 L of liquid oxygen as it vaporized? Express your answer to two significant figures and include the appropriate units. > View Available Hint(s) HA Value Units Submit Part B cal Water's heat of fusion is 80. cal/g, and its specific heat is 1.0 Some velomobile seats have been designed to hold ice packs inside their cushions. If you started a ride with ice packs that held 1500 g of frozen water at 0 C, and the temperature of the water at the end of the ride was 32 C. how many calories of heat energy were absorbed? Express your answer to two significant figures and include the appropriate units. P Pearson
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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