Entropy

Since a finite universe is an isolated system, the Second Law of Thermodynamics states that its total entropy is constantly increasing. It has been speculated, since the 19th century, that the universe is fated to a heat death in which all the energy ends up as a homogeneous distribution of thermal energy, so that no more work can be extracted from any source.

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In almost every process there is an increase in the entropy in the universe. For example, lets say your room is dirty so you think you are decreasing entropy by cleaning it up (decreasing disorder). The truth is that you expend a great amount of energy cleaning your room, and that energy is ultimately released into the universe as heat energy. That heat energy is a less ordered form of energy than the form you received it in, which are the chemical bonds in food. The chemical bonds in food are relatively ordered, but heat energy is very random. heat energy dissipates into the universe randomly, with little order or integrity.

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We really ought to clean this bathroom shelf. But I am worried about the impact doing that would have on the universe.

We actually did a lot of cleaning today. And shopping. And even more significantly ... I had my first bath since December 2006. God it was nice ... Afterwards I was so relaxed I fell asleep on the settee for an hour .... now that really did conserve energy and prevent entropy ...