What defines density of chemical substances?

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    Chemical Density
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Discussion Overview

The discussion revolves around the definition of density for chemical substances, specifically at the same pressure and temperature. Participants explore different types of density, including mass density, and consider the factors influencing density in molecular substances.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions what type of density is being referred to, suggesting mass density as a possible interpretation.
  • Another participant states that the density of molecular substances is influenced by the forces of attraction and repulsion between molecules, specifically mentioning hydrogen and lithium molecules.
  • A participant seeks clarification on whether the discussion pertains to the densities of gases or condensed phases (solids, liquids).
  • There is a challenge to the definition of density provided by one participant, with another asserting that density is defined by the mass of a substance contained in a unit volume and requesting a source for the alternative definition.

Areas of Agreement / Disagreement

Participants express differing views on the definition of density and the factors that influence it, indicating that multiple competing perspectives remain unresolved.

Contextual Notes

There are limitations in the discussion regarding the assumptions made about the types of density being discussed and the definitions used, which are not fully clarified.

Stanley514
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What defines density of chemical substances at the same pressure and temperature?
 
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What type of density are you talking about? Mass density?
 
dextercioby said:
What type of density are you talking about? Mass density?
Density of molecular substances is defined by forces of attraction and repulsion between its molecules. I wish to know why hydrogen molecules, for example, repulse each other much more than say, Lithium molecules.
 
Are you comparing the densities of gases or densities of condensed phases (solid, liquid)?
 
Stanley514 said:
Density of molecular substances is defined by forces of attraction and repulsion between its molecules.

IDK about that. I always thought the density of a substance was defined by how much mass of the substance was contained in a unit volume. Can you provide another source for your definition of density?
 

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