Question

Give two example of changes in which energy is evolved.​

Answer 1

Answer:

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$<font color="blue">$Several changes occur when energy is given out.

These changes vary. In two cases where energy is given out during a process are:

1) During respiration energy is given out and

2) When you burn something in presence of oxygen, energy is given out in the form of heat.

Answer 2

Answer:

When you burn something in presence of oxygen, energy is given out in the form of heat. The burning of a matchstick, the energy evolved is due to a chemical change. When we whitewash our house, we dissolve quicklime in water. Bubbles and gases evolve and the container becomes hot.