Calculate partial pressure quickly with the Examples.com Partial Pressure Calculator. Enter total pressure and mole fraction for accurate results.

Formula: Partial Pressure (Pi) = Mole Fraction (xi) x Total Pressure (Ptotal)

## How to Use the Partial Pressure Calculator

### Step 1: Understand the Calculation Method

• Calculation Method: Ensure the dropdown menu is set to “Dalton’s Law” for calculating partial pressure based on mole fraction and total pressure.

### Step 2: Enter Total Pressure

• Total Pressure: Input the total pressure of the gas mixture. Type the value directly into the input box labeled “Enter Total Pressure (kPa).”

### Step 3: Enter Mole Fraction

• Mole Fraction: Input the mole fraction of the gas for which you want to calculate the partial pressure. Type the value directly into the input box labeled “Enter Mole Fraction.”

### Step 4: Select Units

• Units of Partial Pressure: Choose the desired unit for the partial pressure calculation from the dropdown menu next to the “Partial Pressure” button (e.g., kPa).

### Step 5: Calculate Partial Pressure

• Partial Pressure Button: Click the purple “Partial Pressure” button to calculate the partial pressure. The result will be displayed in the selected unit.

## Examples of Partial Pressure Calculator

### Example 1: Calculating Partial Pressure of Oxygen in Air

Calculate the partial pressure of oxygen in air at a total atmospheric pressure of 101.3 kPa, given that the mole fraction of oxygen is 0.21.

• Total Pressure (Pₜₒₜₐₗ): 101.3 kPa
• Mole Fraction (xₒ₂): 0.21
• Calculation: Partial Pressure (Pₒ₂)=101.3 kPa×0.21=21.273 kPa
• Result: The partial pressure of oxygen is 21.273 kPa.

### Example 2: Calculating Partial Pressure of Nitrogen in Air

Calculate the partial pressure of nitrogen in air at a total atmospheric pressure of 101.3 kPa, given that the mole fraction of nitrogen is 0.78.

• Total Pressure (Pₜₒₜₐₗ): 101.3 kPa
• Mole Fraction (xₙ₂): 0.78
• Calculation: Partial Pressure (Pₙ₂)=101.3 kPa×0.78=79.014 kPa
• Result: The partial pressure of nitrogen is 79.014 kPa.

### Example 3: Calculating Partial Pressure of Carbon Dioxide in a Gas Mixture

Calculate the partial pressure of carbon dioxide in a gas mixture at a total pressure of 150 kPa, given that the mole fraction of carbon dioxide is 0.05.

• Total Pressure (Pₜₒₜₐₗ): 150 kPa
• Mole Fraction (xₒ₂): 0.05
• Calculation: Partial Pressure (Pₒ₂)=150 kPa×0.05=7.5 kPa
• Result: The partial pressure of carbon dioxide is 7.5 kPa.

### Example 4: Calculating Partial Pressure of Helium in a Helium-Oxygen Mixture

Calculate the partial pressure of helium in a helium-oxygen mixture at a total pressure of 200 kPa, given that the mole fraction of helium is 0.3.

• Total Pressure (Pₜₒₜₐₗ): 200 kPa
• Mole Fraction (xₕₑ): 0.3
• Calculation: Partial Pressure (Pₕₑ)=200 kPa×0.3=60 kPa
• Result: The partial pressure of helium is 60 kPa.

### Example 5: Calculating Partial Pressure of Methane in a Natural Gas Mixture

Calculate the partial pressure of methane in a natural gas mixture at a total pressure of 300 kPa, given that the mole fraction of methane is 0.8.

• Total Pressure (Pₜₒₜₐₗ): 300 kPa
• Mole Fraction (xₘₑₜₕₐₙₑ): 0.8
• Calculation: Partial Pressure (Pₘₑₜₕₐₙₑ)=300 kPa×0.8=240 kPa
• Result: The partial pressure of methane is 240 kPa.

## Can I use the partial pressure calculator for different gas mixtures?

Yes, you can use the partial pressure calculator for any gas mixture by inputting the appropriate total pressure and mole fraction for the specific gas you want to calculate.

## How accurate are the results from the partial pressure calculator?

The results are accurate based on the input values provided and the assumption that the gas mixture behaves ideally. Ensure that you enter correct and consistent data for precise calculations.

## Can the partial pressure calculator handle very large or very small values?

Yes, the partial pressure calculator can handle a wide range of values, both large and small, as long as they are entered correctly and consistently.

## What is Dalton’s Law of Partial Pressures?

Dalton’s Law of Partial Pressures states that the total pressure of a gas mixture is equal to the sum of the partial pressures of each individual gas in the mixture. It is used to calculate the partial pressure of a gas based on its mole fraction and the total pressure of the mixture.

## What is the significance of partial pressure in real-world applications?

Partial pressure is important in various real-world applications, including respiratory physiology, chemical reactions, gas storage and transport, and environmental monitoring. It helps determine the concentration and behavior of gases in different contexts.

## How does the partial pressure of a gas affect chemical reactions?

The partial pressure of a gas can influence the rate and direction of chemical reactions, especially those involving gases. For example, in the Haber process for ammonia synthesis, the partial pressure of nitrogen and hydrogen gases affects the yield of ammonia.