SAMANTHA8997
22.02.2020 •
Chemistry
The terms Q and K refer to reaction components at non-equilibrium and equilibrium conditions, respectively. For a forward reaction to be favored in a living cell, which of the following statements describes the relationship between Q and K?
a. The value of Q must be less than that of K.
b. The value of K must be less than that of Q.
c. No conclusion can be drawn about Q and K for a favorable process.
d. Cells are at equilibrium so none of the above statements is true
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Ответ:
The value of Q must be less than that of K.
Explanation:
The difference of K and Q can be understood with the help of an example as follows
A ⇄ B
In this reaction A is converted into B but after some A is converted , forward reaction stops At this point , let equilibrium concentration of B be [B] and let equilibrium concentration of A be [A]
In this case ratio of [B] and [A] that is
K = [B] / [A] which is called equilibrium constant.
But if we measure the concentration of A and B ,before equilibrium is reached , then the ratio of the concentration of A and B will be called Q. As reaction continues concentration of A increases and concentration of B decreases. Hence Q tends to be equal to K.
Q = [B] / [A] . It is clear that Q < K before equilibrium.
If Q < K , reaction will proceed towards equilibrium or forward reaction will
proceed .
Ответ:
The electrons of an atom, in particular valence electrons, are involved in chemical bonding.
Explanation: The reason is that the electrons are the most movable part of an element. The result of chemical bonding is that the two atoms share the electron density,