When and why is molality preferred over molarity in handling solution in Chemistry?

Explanation

Molality is the number of moles of a solute present in 1000 g of the solvent while molarity is the number of moles of solute present in 1000 mL of the solution. Thus, molality involves only masses which donot change with temperature whereas molarity involves volume which changes with temperature and hence molality is preferred over molarity.