Amount of Reactant Consumed Using Change in Pressure

Determining the Amount of Reactant Consumed Using Change in Pressure 

Although none of the empirical gas laws focuses on the relationship between n and P explicitly, we can rearrange the ideal gas equation to show that n is directly proportional to P at constant V and T  

This refers to a reaction in which there is oniy one gaseous reactant and in which none of the products is a gas, such as the reaction described in Sample Problem 11.9. In reactions involving multiple gaseous species, An refers to the net change in number of moles of gas—and the analysis gets somewhat more complicated. 

Therefore, we can use the change in pressure in a reaction vessel to determine how many moles of a gaseous reactant are consumed in a chemical reaction  

Another air-purification method for enclosed spaces involves the use of scrubbers containing aqueous lithium hydroxide, which reacts with carbon dioxide to produce lithium carbonate and water  

Consider the air supply in a submarine with a total volume of 2.5 X 10 L. The pressure is 0.9970 atm, and the temperature is 25 C. If the pressure in the submarine drops to 0.9891 atm as the result of carbon dioxide being consumed by an aqueous lithium hydroxide scrabber, how many moles of CO2 are consumed  

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