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| 1. |
Definitiion of thermal equilibrium? |
| Answer» Two physical systems are in thermal equilibrium if there is no net flow of thermal energy between them when they are connected by a path permeable to heat. Thermal equilibrium obeys the zeroth law of thermodynamics<br>Thermal Equilibrium\tTwo systems are said to be in thermal equilibrium if the temperatures of the two systems are equal.\xa0\tIn mechanics if the net force on a system is zero, the system is in equilibrium. \tIn Thermodynamics equilibrium means all the macroscopic variables (pressure, temperature and volume) don’t change with time. They are constant throughout.For Example: -\tConsider two bodies at different temperatures one is at 300C and another at 600C then the heat will flow from body at higher temperature to the body at lower temperature.\tHeat will flow till both bodies acquire same temperature.\tThis state when there is no heat flow between two bodies when they acquire the same temperature is known as thermal equilibrium. | |