Question

Why is heat transfer by conduction not significant in fluids?

• A. There is not much temperature difference in fluids.
• B. Heat gained by conduction is unstable in fluids.
• C. Due to larger intermolecular distance, collisions of molecules are reduced.
• D. Because of high mobility, they lose a lot of heat to surrounding.

Answer 1

The correct option is C Due to larger intermolecular distance, collisions of molecules are reduced.

In conduction, when heat is supplied molecules vibrate and heat is transferred in the body due to the collisions between the molecules. In fluids, intermolecular distance is quite large and hence collisions of molecules are reduced. Due to this, heat transfer by conduction is reduced.