$\bullet$ Both classical mechanics and classical statistical mechanics can describe the properties of a system of classical particles.
$\bullet$ In classical statistical mechanics, we assume that we do not know the microstate of a system at any given time. Therefore, we consider all possible microstates at any time, an ensemble.
$\bullet$ In classical mechanics, we do not consider such an ensemble i.e., a large number of copies of the same system. We consider only one system, and still get some correct results.
Below are a few questions.
Do you assume that we know the microstate (i.e., position coordinates and momenta of each particle) for a system of particles in classical mechanics? But since that is not true, why does the classical mechanical description work? At least it describes some properties of the system if not all.
Why doesn't the notion of temperature arise in the discussion of system of particles in classical mechanics?
Why is it that some properties of a system of particles can be described by the classical mechanical approach i.e., no ensemble? Why are some properties cannot be described by classical mechanical approach i.e. use of ensembles and microstates?
For me the holistic picture is missing. If someone could help! I am not currently asking about quantum systems just to simplify matters.