![]() ![]() And when the temperature hasn’t reached the melting point of the substance. Sublimation occurs when the vapor pressure of the substance is greater than the total atmospheric pressure. When Does Sublimation Occur?Īs temperature rises, the vapor pressure of a substance increases. Hence, sublimation is an endothermic process. Any phase transition that occurs from a lower energy level to a higher energy level requires energy.įor instance, solid to liquid, liquid to gas, and solid to gas. To break this rigid structure, we require energy to be supplied to conduct its sublimation.Īlso, a solid exists at a lower energy level than a gas. There exists a strong intermolecular force of attraction between them. ![]() The molecules of a solid are tightly packed. While in an exothermic process, the system releases energy into its surroundings to reach its completion.Ĭonclusion Why is Sublimation an Endothermic Process? In an endothermic process, the system absorbs energy from its surroundings to reach its completion. Sublimation occurs by absorbing heat that provides adequate energy to break the intermolecular force of attraction between the molecules of a solid substance and transform it into a gas. Usually, heat energy is supplied to conduct sublimation to bring about the physical change from a solid to a gas. This is because sublimation requires energy in some form to convert a solid to a gas. So, is sublimation endothermic or exothermic? It’s endothermic. In this article, we’ll provide you with a detailed explanation about sublimation and whether it’s endothermic or exothermic? The triple point of a substance is the temperature at which it can exist in all three states i.e., solid, liquid, and gas in equilibrium. It occurs when the pressure and temperature of a substance are below its triple point in its phase diagram. It’s an exceptional case of vaporization. Sublimation is a phase transition process wherein a substance changes from a solid directly to a gas without forming an intermediate liquid state. ![]()
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