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Molar Volume at STP:
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Molar volume is the volume occupied by one mole of a substance. At Standard Temperature and Pressure (STP - 0°C and 1 atm), one mole of any ideal gas occupies 22.414 liters. This fundamental constant is crucial in gas law calculations and stoichiometry.
The calculator uses the molar volume formula:
Where:
Explanation: This calculation is based on Avogadro's law, which states that equal volumes of gases at the same temperature and pressure contain equal numbers of molecules.
Details: Molar volume calculations are essential for converting between moles and volume in gas reactions, determining gas densities, and solving stoichiometry problems involving gases. It's a fundamental concept in chemistry education and industrial gas calculations.
Tips: Enter the number of moles of gas. The calculator will compute the volume at STP conditions (0°C and 1 atm pressure). Ensure the input is positive and valid.
Q1: What does STP stand for?
A: STP stands for Standard Temperature and Pressure, defined as 0°C (273.15 K) and 1 atmosphere (101.325 kPa) of pressure.
Q2: Why is molar volume the same for all ideal gases at STP?
A: According to Avogadro's principle, one mole of any ideal gas contains the same number of molecules (6.022 × 10²³) and occupies the same volume under identical temperature and pressure conditions.
Q3: How does temperature affect molar volume?
A: Molar volume increases with temperature according to Charles's Law (V ∝ T). At room temperature (25°C), molar volume is approximately 24.465 L/mol.
Q4: What is the difference between STP and SATP?
A: SATP (Standard Ambient Temperature and Pressure) is 25°C and 100 kPa, where molar volume is 24.789 L/mol, while STP is 0°C and 101.325 kPa with 22.414 L/mol.
Q5: When is this calculation not accurate?
A: For real gases at high pressures or low temperatures where gas molecules have significant volume and intermolecular forces, deviations from ideal behavior occur.