Changes of State. The bubbles rise through the water and escape from the pot as steam. It occurs when a liquid turns into a gas far below its boiling point. At this point, the matter has entered the liquid state. These are called the states of matter. At low temperatures, molecular motion decreases and substances have less internal energy. Matter can exist in a solid, liquid or gaseous state, and the state a substance is in can be largely determined by its temperature. The temperature will then remain at that point until all of the liquid is boiled away. When a solid is heated, the particles are given more energy and start to vibrate faster. The world around you is filled with interesting facts like these. Continued heating will cause the substance to evaporate or boil, which changes it to the gas state. When a liquid is heated, the particles are given more energy. When a solid is heated, its temperature rises until it reaches its melting point. FactMonster.com is certified by the kidSAFE Seal Program. It does not matter if a substance melts, freezes, boils, evaporates, condenses or sublimates - the mass does not change. Heating a substance in the solid state will cause it to, , which changes it to the liquid state. The energy absorbed by the colder substance facilitates them to overcome the strong intermolecular force of attraction. Under conditions of constant pressure temperature is the primary determinant of a substance's phase. You have to use all of your tricks when that happens. In the physical alteration, there is no change in the identity of a matter. All matter exists as solids, liquids, or gases. This is the temperature at which water turns to steam. This lesson will answer those questions. Ans: Sublimation is defined as the process in which the solid-state changes to a gaseous state without changing into a liquid state. It depends on the energy supplied or absorbed by the substance in which form they are changing. The condensation process is just the reverse of the condensation process. The same water turns into a gas (called water vapor) if it is heated up. It results in the close packing of particles and a strong force of attraction between them. It is the opposite process to melting. If water is heated, it changes to steam (a gas). It will interest you to know that every object in existence undergoes a state change. Any cold substance when brought to a warmer area absorbs energy. States of Matter - Changing States 1. We have previously learned that almost all pure substances can exist in the three different states – solid, liquid and gas. The process in which a solids change to a liquid is called melting. It does not matter if a substance melts, freezes, boils, evaporates, condenses or sublimates - the mass does not change. Have you ever wondered why ice turns into the liquid state after melting? However, in case of chemical change, you cannot reverse it back or if it’s reversible under only certain conditions.