Formula Used:
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Definition: This calculator determines the density of a gas based on Graham's Law of Effusion, which relates the effusion rates of two gases to their densities.
Purpose: It helps in determining unknown gas densities when the effusion rates and density of a reference gas are known.
The calculator uses Graham's Law formula:
Where:
Explanation: The density of the first gas is calculated by dividing the known density of the second gas by the square of the ratio of their effusion rates.
Details: This calculation is fundamental in gas analysis, helping identify unknown gases and understanding their properties relative to known gases.
Tips: Enter the density of the second gas, effusion rates for both gases. All values must be > 0. The result will be displayed in kg/m³.
Q1: What is Graham's Law of Effusion?
A: Graham's Law states that the rate of effusion of a gas is inversely proportional to the square root of its molar mass (or density at constant temperature and pressure).
Q2: What are typical units for effusion rates?
A: While we use m³/s in this calculator, effusion rates can be measured in any volume per time units as long as both rates use the same units.
Q3: Why does the ratio need to be squared?
A: The square accounts for the inverse square root relationship in Graham's original law formulation.
Q4: Can I use this for gas mixtures?
A: The law applies to pure gases. For mixtures, results will represent average properties.
Q5: How accurate is this calculation?
A: It's theoretically accurate for ideal gases under identical conditions of temperature and pressure.