👉 Butler's law, also known as Butler's Law, is a fundamental principle in thermodynamics that describes the behavior of heat and mass transfer between two containers or systems. The expression "butler's law" refers to the statement that the rate at which heat or mass flows from one container to another can be described by the relationship: \[ \frac{dQ}{dt} = kA - kB \] Where: - \( Q \) is the heat transferred between the two containers