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Partial Pressure Formula:
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Partial pressure is the pressure that a gas in a mixture of gases would exert if it alone occupied the entire volume. It's a fundamental concept in gas laws and is calculated using Dalton's Law of Partial Pressures.
The calculator uses the partial pressure formula:
Where:
Explanation: The partial pressure of a gas in a mixture is equal to the product of its mole fraction and the total pressure of the mixture.
Details: Partial pressure calculations are essential in various fields including chemistry, physics, respiratory physiology, and engineering. They help determine gas concentrations, predict chemical reactions, and understand gas exchange in biological systems.
Tips: Enter the mole fraction (between 0 and 1) and the total pressure in Pascals. Both values must be valid (mole fraction between 0-1, total pressure > 0).
Q1: What is mole fraction?
A: Mole fraction is the ratio of the number of moles of a particular component to the total number of moles of all components in the mixture.
Q2: Can I use different pressure units?
A: The calculator uses Pascals (Pa), but you can convert from other units (atm, mmHg, bar) before entering the value.
Q3: Does this work for ideal gases only?
A: The formula applies to ideal gas mixtures. For real gases, corrections may be needed at high pressures or low temperatures.
Q4: How is partial pressure related to concentration?
A: For ideal gases, partial pressure is directly proportional to concentration through the ideal gas law (P = nRT/V).
Q5: Why is partial pressure important in breathing?
A: Gas exchange in lungs occurs due to differences in partial pressures between alveolar air and blood, driving oxygen into and carbon dioxide out of the bloodstream.