How does increasing temperature affect the specific gravity (SG) of a substance?

Increasing temperature typically leads to a decrease in the specific gravity (SG) of a substance due to changes in density. Specific gravity is defined as the ratio of the density of a substance to the density of a reference substance, usually water. When the temperature rises, most substances expand, resulting in a decrease in density. Since SG is directly influenced by the density of the substance being measured, as the density decreases with an increase in temperature, the specific gravity corresponds by also decreasing.

This relationship holds true for the majority of liquids and solids, though some materials may behave differently under specific conditions. However, the general trend is that as the temperature goes up, density falls, causing specific gravity to decrease as well. Thus, understanding how temperature affects density is key to grasping the behavior of specific gravity in various substances.