Question

why is heat transfer in liquids and gases not possible by conduction

Answer 1

Heat energy is transferred from hot places to cooler places by convection. Liquids and gases expand when they are heated. This is because the particles in liquids and gases move faster when they are heated than they do when they are cold.

Answer 2

The particles in these fluids can move from place to place. Convection occurs when particles with a lot ofheat energy in a liquid or gasmove and take the place of particles with less heat energy. ... This is because the particles in liquids and gasesmove faster when they are heated than they do when they are cold.

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