Question

Which TWO must be held constant when applying Avogadro’s law?

temperature

volume

pressure

moles

Answer 1

When applying Avogadro’s law, the two conditions that must be held constant are **temperature** and **pressure**. Avogadro's law states that equal volumes of gases, at the same temperature and pressure, contain an equal number of molecules. Thus, to properly apply the law, both temperature and pressure need to remain constant. Volume and moles may vary as they are directly related to the number of gas particles present.