Q. 8.56 - An Introduction to General, Organic, and Biological Chemistry

Question

In a gas mixture, the partial pressure are argon $415 mmHg$, neon $75 mmHg$, and nitrogen $125 mmHg$. What is the total pressure, in $mmHg$, exerted by the gas mixture?

Step-by-Step Solution

Answer

The total pressure is $615 mmHg$.

Step 1: Given Information

We need to find the total pressure. 

Step 2: Simplify

In a gas, mixture, each gas exerts its partial pressure, which is the pressure it would exert if it were the gas in the container. Dalton's law that the total pressure of a gas mixture is the sum of the partial pressures of the gases in the mixture. 

The total pressure is:

Argon is $P_{Ar}=415 mmHg$

Neon is $P_{ne}=75 mmHg$

Nitrogen is $P_n=125 mmHg$

$$\begin{gathered} P_{total}=P_{Ar}+P_{ne}+P_n \\ =415 mmHg+75mmHg+125 mmHg \\ =615 mmHg \end{gathered}$$