Energy is needed for a change to take place. Give two examples to support this statement.
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Energy is needed for a change to take place. Give two examples to support this statement.
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1. We bake chapaties -- heat energy is provided to dough.
2. We kick a football at rest and ball comes into motion -- kinetic energy is transferred to the ball.
In case of chemical thermodynamics, a change in energy is noted as change in energy.
This takes place due to the occurence of the chemical reactions.
Again, when fire is burnt there is a change in energy and it is a chemical reaction which produces a lot of energy as a consequence.