So you don't really understand the second law of thermodynamics. That is understandable because the popular treatments do not typically do it justice. Yes, a gas will expand over time because of entropy effects.<quoted text>
OK I will play....
The theory of Evolution violates The Second Law of Thermodynamics (law of increasing entropy) says that things which start out concentrated together spread out over time. If you heat one room in a house, then open the door to that room, eventually the temperature in the whole house evens out (reaches equilibrium). Knowing how far this evening-out has progressed at any point in time tells you the entropy. Entropy can measure the loss of a system's ability to do work. Entropy is also a measure of disorder, and that is where evolution theory hits an impenetrable wall. Natural processes proceed in only one direction, toward equilibrium and disorder. Things fall apart over time, they do not get more organized. We can overcome this by making a machine and adding energy, but the Second Law prevents such a machine from assembling spontaneously from raw materials.
On the other hand, the separation of oil and water is also driven by entropy effects. The oil and water do NOT 'spread out' because of entropy. They separate. Until you understand why that is possible, you do not understand the concept of entropy.
Next, we *never* overcome a law of nature. In particular, we can use machines and supply them with energy and produce *local* decreases of entropy, but the overall entropy will increase when we consider the whole system which also includes the machine.
In the case of the Earth, there is a *huge* energy source about 93 million miles away that drives most of the reactions involved in life. You may have heard of it; it is called the sun. And, when the energy from the sun is added into the calculation of entropy, the changes due to evolution are paltry in comparison. In particular, every single reaction involved in living things obeys the second law of thermodynamics, even when those living things are growing and forming new structure. The amount of change between generations due to evolution is dwarfed by the changes in each generation from growth and waste elimination (a huge contribution, by the way).
Next, entropy is something we can actually calculate and measure. We can follow how entropy increases for each and every chemical reaction involved in life. Simple things like mutation and selection come nowhere close to violating the second law.
So, if this is your opening salvo, it only shows the prediction you will misunderstand the science is upheld. If you want more details about the second law, go read a book on thermodynamics, and then another one on statistical mechanics. Once you do that (and I have), come back and we can talk about how the second law applies to evolution in detail.