When a solid is placed in a container and heat is applied, a phase change occurs. Watch the video and identify which of the foll
owing statements are correct. Check all that apply. View Available Hint(s) Check all that apply. The temperature increases while all of a liquid is converted to a gas. The average kinetic energy of the system changes while all of a solid is converted to a liquid. Temperature remains constant while all of a solid is converted to a liquid. When heat is applied to a solid, the molecular motion decreases as the temperature increases. When a solid is converted to a liquid, heat is absorbed.
Phase change is said to occur when a substance from one state of matter changes to another state. Phase change occurs at a fixed temperature. For example, water boils and converts to steam at 100°C. During the phase change, the average kinetic energy of the system remains constant which is indicated by constant temperature. Actually, the molecular motion does increase with increase in heat but heat is absorbed in breaking the bonds and formation of new bonds.
That is because there are other forces like the friction forces that apply differently on both of them. The frictional forces applied to the sled are smaller than they are on the father, for example, so it's possible for him to pull it.
