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Ideal Gas Law Formula:
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The Ideal Gas Law is a fundamental equation in chemistry that relates pressure, volume, temperature, and the number of moles of an ideal gas. For calculating molarity from pressure, we use the simplified form M = P/(R×T), where M is molarity (mol/L), P is pressure (bar), R is the gas constant, and T is temperature (K).
The calculator uses the Ideal Gas Law formula:
Where:
Explanation: This equation calculates the molar concentration of a gas in solution based on its partial pressure, assuming ideal gas behavior.
Details: Calculating molarity from pressure is essential in various chemical and biological applications, including gas solubility studies, Henry's law applications, and understanding gas-liquid equilibria in environmental and industrial processes.
Tips: Enter pressure in bar, temperature in Kelvin, and the appropriate gas constant value. The default gas constant is 0.083144 L·bar/mol·K, which is appropriate for most calculations. All values must be positive.
Q1: When is this calculation applicable?
A: This calculation is valid for ideal gases at relatively low pressures and high temperatures where gas behavior approximates ideality.
Q2: What is the standard gas constant value?
A: The standard value for R is 0.083144 L·bar/mol·K, though different units may require different values of R.
Q3: How does temperature affect the result?
A: Higher temperatures result in lower molarity values for the same pressure, as the relationship is inversely proportional.
Q4: Are there limitations to this equation?
A: Yes, real gases deviate from ideal behavior at high pressures and low temperatures. The calculation also assumes the gas is perfectly soluble and doesn't account for interactions with the solvent.
Q5: Can this be used for gas mixtures?
A: For gas mixtures, you would use the partial pressure of the specific gas component rather than the total pressure.