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Covers the study of (primarily homogeneous) macroscopic systems from a heat/energy/entropy point of view. Consider also using the tag: [statistical-mechanics].

When to Use This Tag

should be used if your question discusses the time-evolution of a mostly homogeneous, macroscopic system – for example, a cold bottle of water in a warm bathtub. You can combine this tag with for a microscopic derivation of thermodynamical laws and maybe with the other ‘macroscopic’ tags, such as or , depending on your problem. Tagging a question as both and usually makes no sense unless in the context of .