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Definitions from the WebHeat of VaporizationDescription:The heat of vaporization, also known as enthalpy of vaporization, is the amount of heat energy required to convert a substance from its liquid state to its gaseous state at a constant temperature and pressure. Senses and Usages:Sense 1 (Physics):In physics, the heat of vaporization is a physical property that characterizes the tendency of a substance to evaporate. It is commonly expressed in joules per mole or calories per gram. The evaporation process absorbs heat energy from the surroundings, resulting in cooling effects. Example sentence 1: The heat of vaporization for water is approximately 40.7 kJ/mol at its boiling point. Example sentence 2: Understanding the heat of vaporization is crucial in designing efficient heat exchangers. Sense 2 (Chemistry):In chemistry, the heat of vaporization is an important parameter used to assess the volatility and intermolecular forces of a substance. It plays a significant role in various chemical processes such as distillation, purification, and energy storage. Example sentence 1: The heat of vaporization of ethanol is about 38.56 kJ/mol. Example sentence 2: The heat of vaporization is a key factor in determining the vapor pressure of a liquid at a specific temperature. Sense 3 (Thermodynamics):In thermodynamics, the heat of vaporization is employed to calculate the enthalpy change during phase transitions. It helps in understanding the energy requirements for converting a substance from liquid to gas or vice versa. Example sentence 1: The heat of vaporization can be used to determine the boiling point of a liquid under different pressures. Example sentence 2: The heat of vaporization allows us to study the behavior of substances during evaporation and condensation processes. Possible Related Products: | ||||
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