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5 days ago · Updated on May 29, 2024. This alphabetical chemistry dictionary offers definitions and examples of important chemistry and chemical engineering terms. For each term, a brief definition is given, and each link leads to a more comprehensive discussion of the word.
5 days ago · Study with Quizlet and memorize flashcards containing terms like heterogeneous, homogeneous, elements and more.
2 days ago · Science is a rigorous, systematic endeavor that builds and organizes knowledge in the form of testable explanations and predictions about the world. Modern science is typically divided into three major branches: the natural sciences (e.g., physics, chemistry, and biology), which study the physical world; the social sciences (e.g., economics, psychology, and sociology), which study individuals ...
5 days ago · Second law of thermodynamics, statement describing the amount of useful work that can be done from a process that exchanges or transfers heat. The concept of entropy was introduced as a precise mathematical way of testing whether the second law of thermodynamics is violated by a particular process.
- The Editors of Encyclopaedia Britannica
- The second law of thermodynamics asserts that heat cannot move from a reservoir of lower temperature to a reservoir of higher temperature in a cycl...
- Scottish physicist William Thomson, also known as Lord Kelvin, and German physicist Rudolf Clausius developed the second law of thermodynamics in t...
- One notable example of the second law of thermodynamics is the heat engine model. Heat engines involve a cycle of increasing and decreasing tempera...
- The second law of thermodynamics posits that the transfer of energy involves some released as heat. This inefficient energy transfer plays a role i...
- Some have contended that the second law of thermodynamics disproves evolution because the law stipulates that entropy always increases, whereas evo...
4 days ago · nitrogen (N), nonmetallic element of Group 15 [Va] of the periodic table. It is a colourless, odourless, tasteless gas that is the most plentiful element in Earth ’s atmosphere and is a constituent of all living matter.
6 days ago · By definition, any two atoms with an identical number of protons in their nuclei belong to the same chemical element. Atoms with equal numbers of protons but a different number of neutrons are different isotopes of the same element.
4 days ago · solid, one of the three basic states of matter, the others being liquid and gas. (Sometimes plasmas, or ionized gases, are considered a fourth state of matter.) A solid forms from liquid or gas because the energy of atoms decreases when the atoms take up a relatively ordered, three-dimensional structure. Solids exhibit certain characteristics ...
