Question

Coal produces energy on burning, but we can not get energy by eating it while eating an apple gives us energy. Explain why it is so.

Answer 1

Coal produces energy on burning and chemical reactions take place. Here,the energy that is produced are not about the energy we get from Apple.Both are entirely different.The energy we get from eating apple is because of the nutrients present in it which is good for our health.Coal produces various gases during burning and certain reactions take place that is why it is said to energy.