The presence of salt in water does not directly affect the latent heats of fusion and evaporation. The latent heat of fusion refers to the amount of heat required to change a substance from a solid to a liquid state at its melting point, while the latent heat of evaporation represents the heat required to convert a liquid into a gas at its boiling point.
Adding salt to water primarily affects its boiling point elevation and freezing point depression through the process of colligative properties. When a nonvolatile solute like salt is dissolved in a solvent, such as water, it lowers the vapor pressure of the solvent and disrupts the formation of the crystal lattice during freezing, thus lowering the freezing point and increasing the boiling point of the solution compared to pure solvent.
However, the latent heats of fusion and evaporation are inherent properties of the substance being melted or vaporized, independent of the presence of solutes. These values remain relatively constant for pure substances under normal conditions. So, while salt affects the freezing and boiling points of water, it does not directly influence the latent heats associated with phase changes.