The total amount of energy is neither increased nor decreased in any physical process. Energy can be transformed from one kind to another, but total energy of all kinds remains constant. Used in many tables you will look at. It is the rate at which energy is being used, not the amount of energy that is or has been used. Heat cannot be converted 100 percent into work.
Natural processes tend to move towards a state of greater disorder.
Entropy is a measure of disorder. The change in entropy is defined as the heat flow into substance divided by its absolute temperature.