# Specific Heat of Water Solution

If we add an ionic solute to water, will the specific heat of the water be increased or decreased?

I understand that the specific heat is a measure of how much energy we must add to water for the average kinetic energy of the water molecules to go up by a certain unit.

I also understand that hydrogen bonding is what limits the kinetic energy of the water molecules. This accounts for water's high specific heat.

However, when adding an ionic solute to water, such as $\ce{KI}$, we disrupt the hydrogen bonding. So we may expect the specific heat of a water solution to be lower than that of pure water.

On the other hand, there are ion-dipole interactions created, correct? These will act to at least partially counteract the specific heat depression, correct?

• possible duplicate of physics.stackexchange.com/questions/2066/… – DavePhD Jun 5 '14 at 2:44
• Nice! I'll check it out! – Dissenter Jun 5 '14 at 2:45
• Actually that link does not bring up ion-dipole interactions; it is simply a discussion about one person's empirical findings. Could anyone shed some light on this? – Dissenter Jun 5 '14 at 14:20