How do you express the physical state of substances in the chemical equation ?

Why is it necessary to mention the physical state of substances in a thermochemical equation ?

Which of the following equations does not (do not ) represent correctly the physical states of the substances involved in the chemical reactions ?

Write the following chemical reaction including the physical states of the substances and balance the chemical equation. Sodiumhydroxides reacts with hydrochloric acid to form sodium chloride and water

The physical state of a substance can be changed by

Write the following chemical reaction including the physical states of the substances and balance the chemical equation. Barium chloride reacts with liquid sodium sulphate to leave barium sulphate as precipitate and also form liquid sodium chloride

(g) indicates the physical state of a substance as solid.

How do write balanced chemical equations?

The physical state of substance with lot of empty space(intermolecular) is

How do you appreciate the cemical equations?