isabellemdeakin
09.07.2019 •
Chemistry
Which phase change at standard temperature and pressure represents sublimation?
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Ответ:
Substances on Earth can exist in three phases namely, solid, liquid or gas. The phase can be changed from one to other by any of six changes of phase: melting, condensation, freezing, vaporization, decomposition or sublimation.
Chemical process in which a solid turns to a gas without going to liquid stage is known as sublimation. It is an endothermic (absorbs heat) process. For example: Transformation of dry ice (solid carbon dioxide) to vapors to form clouds.
Hence, phase change at standard temperature and pressure which represents sublimation is solid turns to a gas without going to liquid stage.
Ответ: