Consider the Sublimation of dry ice (solid carbon dioxide). The value of deltaHsub for CO2 is 25.2kj/mol 1) Is this reaction endothermic or exothermic? How do you know? Include two reasons: one based on deltaH and one based on what you know about reactions that involve separating things. 2) Calculate the amount of energy (in kj) it takes to cause the sublimation of 100.0 grams of dry ice
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.
Consider the Sublimation of dry ice (solid carbon dioxide). The value of deltaHsub for CO2 is 25.2kj/mol
1) Is this reaction endothermic or exothermic? How do you know? Include two reasons: one based on deltaH and one based on what you know about reactions that involve separating things.
2) Calculate the amount of energy (in kj) it takes to cause the sublimation of 100.0 grams of dry ice
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