| − | '''Avogadro's Principle''' is a fundamental assumption in [[statistical mechanics]] that all [[gas|gases]] at equal [[volume]], [[temperature]] and [[pressure]] have the same number of molecules. | + | '''Avogadro's Principle''' is a fundamental assumption in [[statistical mechanics]] that all [[ideal gas]]es at equal [[volume]], [[temperature]] and [[pressure]] have the same number of [[molecule]]s. |