Question

Take 2g of calcium oxide in a beaker. Slowly add water to it Answer the following (1)What will be change of temperature? (2) write the balance chemical reaction for the above statement.

Answer 1

(i) The temperature will rise.

(ii) Calcium oxide + water --> calcium hydroxide

CaO + H2O --> Ca(OH)2

Answer 2

Given:

Water is added to 2g of calcium oxide.

Solution:

• When water is added to 2g of calcium oxide, chemical reaction occurs and leads to the formation of calcium hydroxide.
• During this reaction, a high amount of heat is released due to which the lower temperature of the reaction changes to high temperature.
• The reactants involved in this reaction are calcium oxide and water, whereas the product formed is calcium hydroxide and heat is released.
• The balanced chemical reaction for the given statement is as follows:

$CaO + H_2O\rightarrow Ca(OH)_2 + Heat$

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