Question

which decomposition reaction involves heat ?​

Answer 1

Answer:

Thermolysis

Explanation:

Thermal compositions, like endothermic reactions, need heat to break chemical bonds during decomposition.

Calcium carbonate (limestone) decomposes into calcium oxide + carbon dioxide when heated.

CaCO3 → CaO + CO2

Answer 2

Answer:

The decomposition of Washing soda into sodium bicarbonate and water is a decomposition reaction which involves heat.

The equation for the reaction is:

$\tt{Na_{2}CO_{3}.10H_{2} \rightarrow Na_{2}CO_{3} + 10H_{2}O}$

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