When elemental carbon is burned in the open atmosphere, with plenty of oxygen gas present, the product is carbon dioxide. C (s) + O2 (g) → CO2 (g) However, when the amount of oxygen present during the burning of the carbon is restricted, carbon monoxide is more likely to result. 2C (s) + O2 (g) → 2CO2 (g) What mass of each product is expected when a 5.00-g sample of pure carbon is burned under each of these conditions?
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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