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Molar Volume Formula:
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Molar volume is the volume occupied by one mole of a substance (chemical element or chemical compound) at a given temperature and pressure. It is a fundamental concept in chemistry and is typically expressed in liters per mole (L/mol) at standard temperature and pressure (STP).
The calculator uses the molar volume formula:
Where:
Explanation: The formula calculates the volume occupied per mole of substance by dividing the total volume by the number of moles.
Details: Molar volume is crucial for stoichiometric calculations in chemistry, gas law calculations, and determining the density of substances. It's particularly important in understanding the behavior of ideal gases.
Tips: Enter the total volume in liters and the amount of substance in moles. Both values must be positive numbers. The calculator will compute the molar volume in liters per mole.
Q1: What is the molar volume of an ideal gas at STP?
A: The molar volume of an ideal gas at standard temperature and pressure (STP: 0°C and 1 atm) is approximately 22.414 L/mol.
Q2: Does molar volume change with temperature and pressure?
A: Yes, molar volume is dependent on temperature and pressure according to the ideal gas law (PV = nRT).
Q3: How does molar volume differ between gases and solids/liquids?
A: Gases have much larger molar volumes than solids or liquids because gas molecules are far apart. For example, water has a molar volume of about 0.018 L/mol as a liquid but 22.4 L/mol as a gas at STP.
Q4: Can molar volume be used for mixtures?
A: For ideal gas mixtures, yes. For non-ideal systems or condensed phases, the concept becomes more complex and may not be directly applicable.
Q5: What are typical molar volumes for common substances?
A: At STP: Oxygen (O₂) ≈ 22.4 L/mol, Nitrogen (N₂) ≈ 22.4 L/mol, Water (liquid) ≈ 0.018 L/mol, Sodium chloride (solid) ≈ 0.027 L/mol.