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Gas particles move rapidly. There is very little empty space in a gas. A gas is composed of very small particles. Gas particles do not attract or repel one another.
Charles’ Law states that at constant pressure, the volume of a gas increases or decreases by the same factor as its temperature. This can be written as: V1T1=V2T2. According to Kinetic Molecular Theory, an increase in temperature will increase the average kinetic energy of the molecules.
There are three main components to kinetic theory: No energy is gained or lost when molecules collide. The molecules in a gas take up a negligible (able to be ignored) amount of space in relation to the container they occupy. The molecules are in constant, linear motion.
The kinetic molecular theory suggests that the vapor pressure of a liquid depends on its temperature. As can be seen in the graph of kinetic energy versus number of molecules, the fraction of the molecules that have enough energy to escape from a liquid increases with the temperature of the liquid.
Each substance has its own characteristic density because of the size, mass, and arrangement of its atoms or molecules.
Since different substances have different densities, scientists can measure the density of a substance to identify the substance. They can also use the measure of density to find out if the substance will sink or float.
What is DENSITY ? DENSITY is a physical property of matter, as each element and compound has a unique density associated with it. Density defined in a qualitative manner as the measure of the relative “heaviness” of objects with a constant volume.