The latent heat of seawater is different than pure water due to the dissolved solids and gases present.

Question

Quizplus · Accepted Answer

The dissolved solids and gases lower seawater's latent heat by approximately 4%. The solids are able to lower the freezing point because it is difficult for water molecules to form the necessary lattice pattern of a solid. Information can be found in the section Water Has Unusual Thermal Characteristics.

The Latent Heat of Seawater Is Different Than Pure Water