Final answer:
True, the normal boiling point of water is 100°C and it is a physical property. Liquids like glycerol have higher boiling points. The kinetic molecular theory describes particles in a solid as closely packed and vibrating in place.
Step-by-step explanation:
The statement that the normal boiling point of water is 100°C is true, and it is indeed a physical property of the substance water. The boiling point is a characteristic temperature where a liquid turns into a gas, and it varies depending on the pressure of the environment. Water boils at 100°C at 1 atmosphere of pressure, which is the standard pressure at sea level. However, this boiling point can change if the pressure differs; for example, at a pressure greater than 1 atm, water's boiling point will be higher than 100°C.
An example of a liquid that boils at a temperature higher than the boiling point of water is glycerol, which boils at about 290°C. This is significantly higher than water's boiling point due to the stronger intermolecular forces in glycerol compared to water. The kinetic molecular theory explains the behavior of particles in solids, liquids, and gases. When describing a solid under this theory, the particles are closely packed together, vibrating in place, which gives solids a fixed shape and volume.