Q29 of 55 Page 56

Name the energy which arises due to motion of atoms or molecules in a body. How is this energy affected when the temperature is increased?

Thermal energy arises due to motion of atoms or molecules in the body. If we increase temperature then then the kinetic energy of atom and molecule increase rapidly, due to this motion of atom or molecule become faster. Hence thermal energy arises.


More from this chapter

All 55 →
27

The magnitude of surface tension of liquid depends on the attractive forces between the molecules. Arrange the following in increasing order of surface tension:

Water, alcohol (C2H5OH) and hexane [CH3(CH2)4CH3)].


 28

Pressure exerted by saturated water vapour is called aqueous tension. What correction term will you apply to the total pressure to obtain pressure of dry gas?

 30

Name two intermolecular forces that exist between HF molecules in liquid state.

 31

One of the assumptions of kinetic theory of gases is that there is no force of attraction between the molecules of a gas. State and explain the evidence that shows that the assumption is not applicable for real gases.