Compare bromine (Br₂) and chlorine (Cl₂). One is a gas at room temperature while the other is a liquid. Which do you think is more likely to be a liquid and why? 1. Br₂ because Br-Br bonds are stronger than CI-CI bonds and require more energy to break upon vaporization. 2. Cl₂ because CI-CI bonds are stronger than Br-Br bonds and require more energy to break upon vaporization. 3. Br₂ because the IMFs in bromine are stronger than the IMFs in chlorine and require more energy to overcome upon vaporization. 4. Cl₂ because the IMFs in chlorine are stronger than the IMFs in bromine and require more energy to overcome upon vaporization. O 3 02 01 04
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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