liquids and gases are heated by convection. Explain the convection on the basis of the kinetic model
Answers
Convection happens in fluids.The heat moves through the material as the particles in the materials move through the materials.Hot liquids and gases rise because when they are heated they expand and become less dense.
Answer:
When a liquid contained in a vessel is heated from the base of the vessel, then the particles of liquid in the region of heat source absorb heat energy. The heat energy absorbed by the particles increases their kinetic energy, and hence, they move more vigorously. These energetic particles move away from the source of heat, i.e., rise upward. This results in the fall in pressure. To equalise the pressure, the particles of liquid from the colder regions sink down, i.e., they move towards the source of heat. This in turn gives rise to convection currents.