Why do you need to calculate microstates in chemistry? Chemistry Thermochemistry Entropy 1 Answer Truong-Son N. Jul 2, 2018 We don't really NEED to... but we can... Anyways... I go over what microstates are, here. An example that should be easy to follow is here. A simple example on #"O"_2# is here. A much more detailed calculation example with methane is gone into here. Answer link Related questions How does entropy change with pressure? How do you calculate entropy? How do you calculate entropy change? How do you calculate entropy of vaporization? Why does entropy increase with an increase in temperature? Why is entropy of the universe increasing? Can entropy be zero? How do free energy and entropy relate? When does entropy increase? What is the difference between entropy and enthalpy? See all questions in Entropy Impact of this question 1700 views around the world You can reuse this answer Creative Commons License