Question

A sample of 2 moles of Neon is in a 1.5 L container at STP ( 0C and 101.3kpa). If the volume is doubled, what would have to happen to the number of moles of Ne to maintain STP? calculate how many moles of Ne would be needed

Avogadro's law

Answer 1

According to Avogadro’s law, at a constant temperature and pressure, the volume of a gas is directly proportional to the number of moles of the gas. This means that if the volume of the container is doubled while maintaining STP (standard temperature and pressure), the number of moles of Ne would also have to double in order to maintain STP.

Since the initial number of moles of Ne is 2, if the volume is doubled, the number of moles of Ne would have to increase to 2 * 2 = 4 moles to maintain STP.

Answer 2

According to Avogadro's law, at constant temperature and pressure, equal volumes of gases contain equal numbers of molecules.

If the volume is doubled, the number of moles of Neon would have to be doubled as well to maintain STP conditions.

The initial volume of Neon is 1.5 L, which contains 2 moles of Neon. If the volume is doubled, the new volume is 3 L, and we need to calculate how many moles of Neon would be needed to maintain STP.

Using the ideal gas law, PV = nRT, we can calculate the number of moles of Neon needed:

n = PV/RT = (101.3 kPa * 3 L) / (0.0821 L·atm/mol·K * 273 K) = 3.7 moles

Therefore, 3.7 moles of Neon would be needed to maintain STP conditions in a 3 L container.