Okay, this becomes much more likely with greater amount of molecules. Now let's explore the relationship between the second law of thermodynamics and entropy. In another video recently, the second law of thermodynamics basically states that heat cannot be completely converted into work. Here we will see a slightly different definition of the second law of thermodynamics. So let's explore these two isolated systems that are the same size, that have the same number of molecules and the same type of molecules. Which one do you think is more probable to occur?