According to Avogadro’s law, under constant pressure and temperature, every gas molecule has_________________?
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Answer: E. occupies same volume
Explanation
Avogadro's law states that equal volumes of gases at identical conditions contain equal molecules. Consequently, every gas molecule occupies the exact same volume per mole under constant pressure. This fundamental gas law applies universally to ideal gases regardless of chemical composition. Amadeo Avogadro proposed this foundational hypothesis in eighteen hundred and eleven. Standard molar volume at standard temperature and pressure equals approximately 22.4 liters. The law bridges microscopic molecular counts with macroscopic volumetric measurements.
Chemical engineers use Avogadro's law when calculating reactant volumes in gas-phase reactions. Atmospheric scientists apply this principle to study gas behavior at varying altitudes. Understanding molar volume is essential for determining molecular weights of unknown gases. Option A incorrectly suggests volume scales directly with molecular weight. Option C claims an inverse relationship with molecular weight which contradicts the law. Option D erroneously links gas volume with specific weight instead of mole counts.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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