Now with the Boltzmann constant ... (That would be n in the ideal gas law.) Using Avogadro's number, we get 2.4 x 10 22 particles. You can't count that high. No one can. But that's N, the number ...

So the book begins with Boltzmann’s suicide and promises to work backward ... which quantitatively gives the relationship between the entropy of an ideal gas and the number of possible microstates – ...

Robert Strain and Philip Gressman at the University of Pennsylvania employed modern mathematical tools to find solutions for the Boltzmann equation, which predicts the motion of gas molecules.