Chemistry, 20.02.2020 08:33 tiffg3140

Explain the difference between physical equilibrium and chemical equilibrium. Give two examples of each.

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Answer from: chaseashley24

Explanation:

In a chemical equilibrium, there are different reactants and products are involved. For example, reaction equation for self-ionization is as follows.

$H_{2}O \rightleftharpoons H^{+} + OH^{-}$

This reaction is a chemical equilibrium. Also, nitrogen dioxide when present in equilibrium with nitrogen tetraoxide represents chemical equilibrium.

$2NO_{2} \rightleftarrow N_{2}O_{4}$

On the other hand, in a physical equilibrium same substance is present in different physical states. For example, when ice is present in equilibrium with water then it shows physical equilibrium.

$H_{2}O(s) \rightleftharpoons H_{2}O(l)$

And, liquid water present in equilibrium with water vapor also represents physical equilibrium.

$H_{2}O(l) \rightleftarrow H_{2}O(g)$

Answer from: Quest

answer: - 3.) the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

solution: - as per the rules, oxidation number of oxygen in its compounds is -2. the sum of oxidation numbers of all the elements of a molecule or compound is zero.

also, the oxidation number in elemental form is zero.

in no, the oxidation number of o is -2 so the oxidation number of n is +2 so that the sum is zero.

similarly, the oxidation number of c in co is +2 and o is -2.

on product side the oxidation number of n is 0 as it is in the elemental form( $n_2$ ) .

oxidation number of c in carbon dioxide is +4 as there are two oxygen in it and we know that each oxygen is -2.

so, oxidation number of n is changing from +2 to 0 and the oxidation number of c is changing from +2 to +4.

since nitrogen is reduced and hence no is acting as an oxidizing agent. carbon is oxidized and so co is acting as a reducing agent.

so, the right choice is number 3.)the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

Answer from: Quest

im pretty sure its b

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Explain the difference between physical equilibrium and chemical equilibrium. Give two examples of e...