Physics
Physics
Problem
Which of the following best defines the condition of thermal equilibrium between two systems? a) The systems have identical masses and internal energies, eliminating any heat transfer. b) The systems are at the same temperature but separated by an insulating barrier, so thermal equilibrium is maintained. c) The systems are in thermal contact and at the same temperature, so no net energy is transferred between them. d) The systems have different temperatures, but heat flows equally in both directions, resulting in zero net transfer.Intuitive explanation
Thermal equilibrium is about when two systems stop "fighting" over heat. The key insight is that it's not about them being the same temperature initially—it's about what happens when they're allowed to interact: if no net heat flows between them, they're in equilibrium. This means they've reached the same temperature, and that's the condition you're looking for.
Intuitive explanation
Thermal equilibrium is about when two systems stop "fighting" over heat. The key insight is that it's not about them being the same temperature initially—it's about what happens when they're allowed to interact: if no net heat flows between them, they're in equilibrium. This means they've reached the same temperature, and that's the condition you're looking for.