Chemistry, 19.08.2019 01:30 shakalalewis7255

Why does the temperature of heated water change when you increase the volume?

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By heating the water the temperature of 0C to 4C, one can observe a decrease in its volume. In this temperature range, there is the phenomenon of anomalous thermal expansion of water.
The volume of water in the range of 0C to 4C decreases and 4C to 100C from growing. This anomalous behavior of water is associated with the fact that liquid water a temperature slightly above 0C, there are remnants of the loose structure of the ice. The temperature increase destroys this structure, allowing denser packing of the molecules, and thus the volume of water decreases.

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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

16- counting by fours

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