Question

How does the viscosity of a liquid affect its specific heat capacit?

Answer 1

In this situation there is a correlation between viscosity and temperature change, but no direct cause-and-effect.

The viscosity increases with the amount of solids (e.g., casein, whey, and fat globules) that are suspended within the liquid. In the case of milk and cream, the viscosity increases approximately in proportion with the fat content. The effects on viscosity depend only on how many particles there are in the milk, and how big they are, but not on the composition of those particles.