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An endothermic process is a chemical or physical process that absorbs heat from its surroundings. Learn about the definition, examples, and distinction between endothermic and endotherm in physics and biology.
An endotherm is an organism that maintains its body temperature by internal heat production, mainly through metabolism. Learn about the origin, mechanisms and examples of endothermy in animals, and the pros and cons of an endothermic metabolism.
An exothermic process is a thermodynamic process or reaction that releases energy to its surroundings, usually in the form of heat. Learn about the definition, examples, and implications of exothermic reactions in chemistry and other fields.
Evaporation is the process of a liquid changing into a gas, such as water vapor or ethanol vapor. Learn how evaporation depends on temperature, humidity, pressure, flow rate, and other factors, and see how it affects the water cycle and human body.
Chemical decomposition is the process of breaking a single chemical entity into two or more fragments. It can be thermal, electrolytic, or photolytic, and it can be endothermic or exothermic.
Lavoisier and Laplace's law (1780): The energy change accompanying any transformation is equal and opposite to energy change accompanying the reverse process. [ 2 ] Hess' law of constant heat summation (1840): The energy change accompanying any transformation is the same whether the process occurs in one step or many.
Endothermic gas is a gas that inhibits or reverses oxidation on the surfaces it is in contact with. This gas is the product of incomplete combustion in a controlled environment. An example mixture is hydrogen gas (H 2 ), nitrogen gas (N 2 ), and carbon monoxide (CO).
Dehydrogenation is a chemical reaction that removes hydrogen from an organic molecule. Learn about different dehydrogenation processes, such as thermal, oxidative, homogeneous and stoichiometric, and their applications and catalysts.