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  2. Chemical free - Wikipedia

    en.wikipedia.org/wiki/Chemical_free

    Chemical free (also chemical-free) is a term used in marketing to imply that a product is safe, healthy or environmentally friendly because it only contains natural ingredients. [1] The term is a misnomer, as all substances and objects are composed entirely of chemicals and energy. The term chemical is roughly a synonym for matter, and all ...

  3. Chemical thermodynamics - Wikipedia

    en.wikipedia.org/wiki/Chemical_thermodynamics

    Chemical thermodynamics. Chemical thermodynamics is the study of the interrelation of heat and work with chemical reactions or with physical changes of state within the confines of the laws of thermodynamics. Chemical thermodynamics involves not only laboratory measurements of various thermodynamic properties, but also the application of ...

  4. Helmholtz free energy - Wikipedia

    en.wikipedia.org/wiki/Helmholtz_free_energy

    v. t. e. In thermodynamics, the Helmholtz free energy (or Helmholtz energy) is a thermodynamic potential that measures the useful work obtainable from a closed thermodynamic system at a constant temperature ( isothermal ). The change in the Helmholtz energy during a process is equal to the maximum amount of work that the system can perform in a ...

  5. Here Are All The Chemical-Free Sparkling Water Brands - AOL

    www.aol.com/chemical-free-sparkling-water-brands...

    Flavor-wise and chemical-wise, Spindrift gets some of the highest marks, with 0.19 ppt PFAS, or parts per trillion ("safe" PFAS levels are seen as being below 1 ppt).

  6. Gibbs free energy - Wikipedia

    en.wikipedia.org/wiki/Gibbs_free_energy

    t. e. In thermodynamics, the Gibbs free energy (or Gibbs energy as the recommended name; symbol ) is a thermodynamic potential that can be used to calculate the maximum amount of work, other than pressure-volume work, that may be performed by a thermodynamically closed system at constant temperature and pressure.

  7. Radical (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Radical_(chemistry)

    Lewis dot structure of a Hydroxide ion compared to a hydroxyl radical. In chemistry, a radical, also known as a free radical, is an atom, molecule, or ion that has at least one unpaired valence electron. [ 1][ 2] With some exceptions, these unpaired electrons make radicals highly chemically reactive. Many radicals spontaneously dimerize.

  8. List of chemical databases - Wikipedia

    en.wikipedia.org/wiki/List_of_chemical_databases

    Small molecules (most of entries have <100 atoms) major conformers with its 3D and easy search on them. M. good correlated with PubChem on data that is available on PubChem. "HugeMDB". 102 million. ICSC. ILO International Chemical Safety Cards. International Labour Organization.

  9. Chemical substance - Wikipedia

    en.wikipedia.org/wiki/Chemical_substance

    A chemical substance is a unique form of matter with constant chemical composition and characteristic properties. [ 1][ 2] Chemical substances may take the form of a single element or chemical compounds. If two or more chemical substances can be combined without reacting, they may form a chemical mixture. [ 3]

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