In a certain chemical reaction, substance A combines with substance B to form substance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is 6 grams. Assume a < b and y ≤ a. At time t seconds after the start of the reaction, the quantity of Y present is y grams. For certain types of reactions, the rate of the reaction, in grams/sec, is given by Rate = k(ay)(b − y), where k is a positive constant. 1. Sketch a graph of the rate against y. For what values of y is the rate nonnegative? Give your answer as a union of intervals, e.g., (- infinity,-a] U (a, 2b) ує 2. Use your graph to find the value of y at which the rate of the reaction is fastest. У =
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.
![In a certain chemical reaction, substance
A combines with substance B to form substance
Y. At the start of the reaction, the quantity of A
present is a grams, and the quantity of B present
is b grams. Assume a < b and y ≤ a. At time t
seconds after the start of the reaction, the
quantity of Y present is y grams. For certain
types of reactions, the rate of the reaction, in
grams/sec, is given by
Rate =
k(a - y)(b − y),
-
where k is a positive constant.
1. Sketch a graph of the rate against y. For what
values of y is the rate nonnegative?
Give your answer as a union of intervals, e.g., (-
infinity,-a] U (a, 2b)
YE
2. Use your graph to find the value of y at which
the rate of the reaction is fastest.
У =](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9adf4f55-d17a-4972-82e6-46de9f138874%2F87344fb5-17d2-40bd-8f24-b8fabf80b9ee%2Fviyy62k_processed.png&w=3840&q=75)
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