avogadro's hypothesis

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avogadro's hypothesis

A student learns about Avogadro's hypothesis in a chemistry textbook.

Definition
  1. Noun:
    • A fundamental principle in chemistry and physics: Avogadro's hypothesis states that equal volumes of all gases, when measured at the same temperature and pressure, contain an equal number of molecules.
Usage
  • This principle is a cornerstone of gas law calculations and stoichiometry.
  • It is used to relate the volume of a gas to the amount of substance (number of molecules or moles).
  • The hypothesis is valid for ideal gases and provides a basis for understanding molar volume.
Examples
  • Noun:
    • Avogadro's hypothesis allows chemists to determine the molecular formula of a gaseous compound.
    • According to Avogadro's hypothesis, one liter of hydrogen and one liter of oxygen at the same temperature and pressure contain the same number of molecules.
Advanced Usage
  • "To apply Avogadro's hypothesis": To use this principle in a calculation or logical deduction.
    • We can apply Avogadro's hypothesis to find the volume of gas produced in the reaction.
  • The hypothesis directly leads to the concept of Avogadro's constant (the number of particles in one mole of a substance).
Variants and Related Words
  • Avogadro's law: Often used interchangeably with Avogadro's hypothesis, especially after it was confirmed experimentally and became an accepted law.
  • Avogadro's number: The number of constituent particles (usually atoms or molecules) in one mole of a substance, approximately 6.022 × 10²³.
  • Molar volume: The volume occupied by one mole of a substance (especially a gas) at a given temperature and pressure, a direct consequence of Avogadro's hypothesis.
Synonyms
  • Avogadro's law: The principle, now established as a law.
  • Avogadro's principle: Another common term for the same concept.
Related Concepts (Not Phrasal Verbs or Idioms)
  • Ideal gas law: A fundamental equation (PV = nRT) that incorporates Avogadro's hypothesis along with other gas laws.
  • Stoichiometry: The calculation of reactants and products in chemical reactions, which relies on concepts derived from Avogadro's hypothesis.
avogadro's hypothesis

A student learns about Avogadro's hypothesis in a chemistry textbook.

Noun
  1. the principle that equal volumes of all gases (given the same temperature and pressure) contain equal numbers of molecules

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