Heat and Thermodynamics

11.1 Introduction

If we hold one end of a metal rod in fire, after some time we feel hot at our hand as that heat moves from the end of the rod on fire to the other end at our hand. We have also seen that if a beaker containing water and potassium permanganate at the bottom of the beaker is heated, after some times pink lines rise from the bottom of the beaker to the top of the beaker turning round, moving towards the bottom of beaker and again moving up. Also, we have the experience of feeling hot when we stand near a furnace. These three experiences categorize three different processes of transfer of heat. The first process of transfer of heat is called conduction of heat. Here, heat waves move through the solid medium without actual movement ...