Avogadro's Law (5.1.5) Flashcards
• Avogadro’s law states that at constant temperature and pressure, the volume of a gas is directly proportional to the number of moles of gas.
• Avogadro’s law states that at constant temperature and pressure, the volume of a gas is directly proportional to the number of moles of gas.
Avogadro’s law states that at constant temperature
and pressure, the volume of a gas is directly
proportional to the number of moles of gas. As the
number of moles increase, the volume increases.
This can be stated mathematically as V ∝ n.
Rearranging this expression yields V/n = constant.
Since the volume divided by the number of moles is
constant, the volume divided by the number of
moles at an initial condition (Vi/ni) will equal the
volume divided by the number of moles at a final
condition (Vf/nf). This relationship can be used to
solve for Vi, ni, Vf, or nf, given the other three
variables.
A helium balloon containing 0.10 mol of gas
occupies a volume of 2.4 L at 25 ˚C and 1 atm.
How many moles have been added if it is inflated to
5.6 L?
The relationship Vi/ni = Vf/nf can be rearranged to
solve for nf (the final number of moles). The number
of moles added (∆n) is the final number of moles (nf)
minus the initial number of moles (ni
), or 0.13 mol.
Avogadro’s law states that at constant temperature
and pressure, the volume of a gas is directly
proportional to the number of moles of gas. As the
number of moles increase, the volume increases.
This can be stated mathematically as V ∝ n.
Rearranging this expression yields V/n = constant.
Since the volume divided by the number of moles is
constant, the volume divided by the number of
moles at an initial condition (Vi/ni) will equal the
volume divided by the number of moles at a final
condition (Vf/nf). This relationship can be used to
solve for Vi, ni, Vf, or nf, given the other three
variables.
A helium balloon containing 0.10 mol of gas
occupies a volume of 2.4 L at 25 ˚C and 1 atm.
How many moles have been added if it is inflated to
5.6 L?
The relationship Vi/ni = Vf/nf can be rearranged to
solve for nf (the final number of moles). The number
of moles added (∆n) is the final number of moles (nf)
minus the initial number of moles (ni
), or 0.13 mol.
