Change+of+substance
21Phase Change Material — A phase change material (PCM) is a substance with a high heat of fusion which, melting and solidifying at a certain temperature, is capable of storing and releasing large amounts of energy. Heat is absorbed or released when the material changes… …
22physical change — noun a change from one state (solid or liquid or gas) to another without a change in chemical composition • Syn: ↑phase change, ↑phase transition, ↑state change • Hypernyms: ↑natural process, ↑natural action, ↑action, ↑ …
23Enthalpy change of solution — The enthalpy of solution (or enthalpy of dissolution) is the enthalpy change associated with the dissolution of a substance in a solvent at constant pressure. The heat of solution is one of the three dimensions of solubility analysis. It is most… …
24Intergovernmental Panel on Climate Change — IPCC redirects here. For other uses, see IPCC (disambiguation). Intergovernmental Panel on Climate Change Org type Panel …
25Équivalence en substance — Principe d équivalence en substance Demande de traduction Substantial equivalence → …
262009 United Nations Climate Change Conference — United Nations Climate Change Conference (COP15) Information Date: 7–18 December 2009 Location: Bella Center, Copenhagen, Denmark …
27Conceptual change — is the process whereby concepts and relationships between them change over the course of an individual person’s lifetime or over the course of history. Research in three different fields – cognitive developmental psychology, science education,… …
28Principe d'équivalence en substance — Demande de traduction Substantial equivalence → …
29Chemical change — 112.198.81.178 (talk) 09:44, 14 November 2011 (UTC)bla da Chemical changes occur when objects or substances are changed or altered. In a chemical change, particles of the original materials collide with one another. Some exothermic reactions may… …
30Standard enthalpy change of combustion — The standard enthalpy of combustion is the enthalpy change when one mole of a substance completely reacts with oxygen under standard thermodynamic conditions (although experimental values are usually obtained under different conditions and… …
