As substance A collides with substance B to form C, not all collisions of A and B result in the formation of C. Which statement explains why the collisions of A and B may not result in the formation of C? (A) The collisions of substances A and B must be elastic for the formation of C. (B) Substances A and B must collide with the correct geometry in order for a reaction to take place. (C) The type of the catalyst (heterogeneous or homogeneous) must be taken into account for the collisions to produce C. (D) The molecularity of the rate law must match the collisions. An example would be if the rate law is third order, then three particles must collide at once.
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.
Two gaseous compounds, A and B are introduced into an evacuated reaction chamber. The resulting reaction is exothermic and the balanced chemical equation is shown below.
A(g) + B(g) ---> C(g)
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