Question
Chemistry Question on Liquid state
Which of the following will increase with the increase in temperature ?
A
Surface tension
B
Viscosity
C
Molality
D
Vapour pressure
Answer
Vapour pressure
Explanation
Solution
As the temperature rises, the kinetic energy of the molecules increases. Due to which the molecules can leave the liquid surface easily. In other words the vapour pressure increases. However, surface tension and viscosity decrease with rise in temperature. Molality is the ratio of moles of solute to weight of solvent, hence it does not depend upon the temperature.