PHYSICS [2 Mark Question Answer]

Sublimation is a process of converting a solid into a vapor state directly by heating it without going through the liquid state. Two substances that can sublime are:
•Camphor. (solid)
•Iodine. (solid)

We can define sublimation as the transition of a substance from the solid phase to the gaseous phase without changing into the liquid phase. This process is an endothermic phase transition that occurs at a temperature and pressure below the triple point of the substance.

Vaporisation can be defined as the process in which the liquid state transforms into the vapor state. The fixed temperature at which a liquid state is converted into a gaseous state due to the process of vaporisation is known as the vaporisation point.

Heat energy brings about change in dimensions:- When a material body (solid, liquid, or gas) is supplied with heat energy, its dimensions change, i.e., on the absorption. of heat energy, the length, the area, and volume of the body increase.

Heat is a form of energy which flows. It is the energy of motion of molecules constituting the body. The unit of heat is same as that of energy, The S.I. unit of heat is joule (abbreviated as J) and other common units of heat are calorie and kilo calorie, where 1 k cal = 1000 cal.