We discussed earlier some basic principles about the behavior of gases called the kinetic-molecular theory. Among other things, this theory suggests that gas molecules are in constant motion, and the average speed of the individual gas particles is dependent upon temperature – the higher the temperature, the faster the molecules move. It is not just gas particles that are in constant motion. The molecules and ions that make up liquids and solutions are also continually moving in nearly random directions. As a result, molecules and ions in a solution will collide with one another fairly frequently. As with gases, a temperature increase will produce an increase in the average particle speed.
Jane wanted to make a batch of candy so she but some water, sugar, corn syrup and flavoring in a pot. After turning on the heat she stirred the the mixture until until it reached 300 degrees Fahrenheit and began to boil. She then turned of the candy and and poured it into molds.
Was the kinetic energy increasing or decreasing when heat was applied to the liqued the liquid?