Science, asked by vandits, 9 months ago

Using a suitable chemical equation, justify that some chemical reactions are determined by

(i) change in colour.

(ii) change in temperature

Answers

Answered by Anonymous

Answer:

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(i) Heating of hydrated copper sulphate crystals, i.e. colour changes. When there is change in the temperature during a chemical reaction they are known as endothermic and exothermic reactions. Methane (natural gas) + oxygen ==> carbon dioxide + water (+ heat energy) CH4 + 2O2 ==> CO2 + 2H2O.

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