| Heat is always transferred from a warmer material to a cooler one. |
| All materials are made up of a mass of molecules in constant motion. The molecules with greater motion, of a warmer material, give up part of their energy to the molecules with less motion, in the material with lower heat load. Accordingly, the molecules in the warmer material slow down, whereas those in the cooler material start moving faster. This transfer continues until the molecules in both materials move with the same speed. When they reach the same temperature, no further heat transfer occurs. |
|
|
|
