
Concept explainers
Interpretation: The use of a
Concept introduction: Machines are all around us doing work for us. They transport us from place to place, helps us to manufacture products, allow us to listen to music, washing our clothes, watch television etc. The source of energy for most of the machines is chemical change.

Answer to Problem 1TAI
In chemical reactions, heat transferred
Explanation of Solution
Work is force acting upon an object causing it to move in the direction of force. So, work is energy in motion. The heat transferred,
Chemical reactions are source of energy.
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