(3) A container holding NO2 and CO gas will lose NO2 gas via the reaction NO2 (g) + CO (g) → NO (g) + CO2 (g) A chemist measures the [NO2] over time and finds that plotting 1/[NO2 ] versus time yields a straight line with a slope of 3.56×10-2 M-1·s-1. If the container originally held 1.00 M NO2, what is the concentration of NO2 after 1.50 hour [NO2]1.5 hrs = ___________ How long will it take the [NO2] to drop to 20% of its initial concentration of 1.00 M? T20% = __________
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.
(3) A container holding NO2 and CO gas will lose NO2 gas via the reaction
NO2 (g) + CO (g) → NO (g) + CO2 (g)
A chemist measures the [NO2] over time and finds that plotting 1/[NO2 ] versus time yields a straight line with a slope of 3.56×10-2 M-1·s-1.
If the container originally held 1.00 M NO2, what is the concentration of NO2 after 1.50 hour
[NO2]1.5 hrs = ___________
How long will it take the [NO2] to drop to 20% of its initial concentration of 1.00 M?
T20% = __________
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