👉 In physics, a thermopair is a pair of particles that can exist in equilibrium and at the same temperature. Thermopairs are defined as pairs where one particle has zero heat capacity and the other particle has negative heat capacity. The thermopair equation states: \[ \Delta U = q + p_1 \cdot (-p_2) \] where \(U\) is internal energy, \(q\) is work done by a system, \(p_1\) is the initial entropy
