1. The problem statement, all variables and given/known data A model universe comprises 100 atoms in system 1 and 1500 atoms in system 2. Compute the entropy for the universe when there are 3 atoms on in system 2 and 97 atoms on in system 1 (using sterlings approximation). 3. The attempt at a solution I am able to find the entropy of systems 1 and 2 by initially finding the number of microstates and then the equation: entropy = boltzmanns * ln(microstates) Just wondering how I would get the entropy of the universe though.