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Partial Pressure Calculator
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Pressure is the force per unit area acting on the walls of the container. Partial pressure is all about pressure exerted by the gas when that particular gas alone is present in the container.
Here there are two Partial Pressure Calculator
1. One calculates the partial pressure if concentration of solute and Henry's Constant are given.
2. Other Calculates the partial pressure if mole fraction and Henry's Constant are given.

Henry's constant kH with different units are given below in the table which helps in doing the manual calculations.

 Element Henry Constant kH in $\frac{L atm}{mol}$ Henry Constant kH in atm O2 769.23 4.259 $\times$ 104 H2 1282.05 7.099 $\times$ 104 Co2 29.41 0.163 $\times$ 104 N2 1639.34 9.077 $\times$ 104 He 2702.7 14.97 $\times$ 104 Ne 2222.22 12.3 $\times$ 104 Ar 714.28 3.955 $\times$ 104 Co 1052.63 5.828 $\times$ 104

## Steps for Partial Pressure Calculator

Step 1 :

Read the given problem and list out the given quantities.

Step 2 :

There are two formulas to Calculate the partial pressure p
If Concentration of the solute is given use the formula
p = kH C

Where kH = Henry's law Constant,
C is the Concentration of the Solute.

If mole fraction of the solute is given then
p = kH x

Where kH = Henry's law Constant

x = Mole fraction of the Solute.

Substituting the values in the formula, we get the answer.

## Problems on Partial Pressure Calculator

1. ### Find the Partial pressure of N2 containing 0.75 mol in a given mixture?

Step 1 :

Given: Concentration of solute C = 0.75 mole
Henry Constant for mole fraction for N2, kH = 9.077 $\times$ 104 atm.

Step 2 :

Since the Concentration of the solute is given we use the formula:
p = kH C

= 9.077 $\times$ 104 $\times$ 0.75

= 6807.75  atm.

The Partial pressure for N2 is 6807.75  atm.

2. ### Find the Partial pressure of Ne having mole fraction of 0.12 in a given mixture?

Step 1 :

Given: Mole fraction, x = 0.12
Henry Constant for mole fraction for Ne, kH = 12.3 $\times$ 104 atm.

Step 2 :

If mole fraction of the solute is given then
p = kH x

= 12.3 $\times$ 104 $\times$ 0.12

= 14760 atm.