Question

give two examples of changes in which energy is given out

Answer 1

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

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.