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Ch.5 - Gases
Tro - Chemistry: A Molecular Approach 4th Edition
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Tutti i libri di testoTro 4th EditionCh.5 - GasesProblema 53
Capitolo 5, Problema 53

Use the molar volume of a gas at STP to determine the volume (in L) occupied by 33.6 g of neon at STP.

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1
Identify the molar mass of neon (Ne) from the periodic table, which is approximately 20.18 g/mol.
Calculate the number of moles of neon by dividing the given mass (33.6 g) by the molar mass of neon (20.18 g/mol).
Recall that at standard temperature and pressure (STP), 1 mole of any ideal gas occupies 22.4 L.
Use the number of moles calculated in step 2 and multiply by the molar volume at STP (22.4 L/mol) to find the volume occupied by the gas.
Ensure the units are consistent and the final answer is in liters (L).

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Molar Volume of a Gas

The molar volume of a gas at standard temperature and pressure (STP) is the volume occupied by one mole of an ideal gas, which is approximately 22.4 liters. This value is crucial for converting between the mass of a gas and its volume, allowing for calculations involving the amount of substance in moles.
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The Ideal Gas Law: Molar Mass

Molar Mass

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). For neon, the molar mass is about 20.18 g/mol. Understanding molar mass is essential for converting the mass of a gas to moles, which can then be used to find the volume using the molar volume.
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Molar Mass Concept

STP Conditions

Standard temperature and pressure (STP) refer to a temperature of 0 degrees Celsius (273.15 K) and a pressure of 1 atmosphere (atm). These conditions are used as a reference point for gas calculations, ensuring consistency when determining properties like volume, which can vary with changes in temperature and pressure.
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02:20
STP Calculation Example
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