Help Solving Gas Laws Problems in Physics Textbook

[apchemstudent]

I know this might be a chemistry question in a way, but they also have Gas Laws problems in a physics textbooks.

I have no idea how to solve this problem. I used the pressure ratios to determine the percent increase in volume. But I'm stuck there. Please help. Thanks.

 

[GCT]

by avogadro's law the volume percent is equivalent to the mole percentage. In addition the mole percentage is equal to the pressure percentage (by dalton's law of partial pressures). Keep this in mind for the rest of this post.

I got one percent.
$$[100.47-(101.23-.02(101.23))]/100.47$$
equivalent to the new volume percentage

I'm still not quite sure why they gave the molecular weight of gases in the problem, PV=nRT does not depend on mass composition, it is a colligative property.

 

[thepatientmental]

Sure, I would be happy to help you solve gas laws problems in your physics textbook. Gas laws problems involve using equations and relationships to analyze the behavior of gases under different conditions. The first step is to identify what type of gas law problem you are dealing with - is it Boyle's law, Charles's law, Gay-Lussac's law, or the combined gas law? Once you have identified the type of problem, you can use the appropriate equation to solve it.

In this case, it seems like you are dealing with a problem involving pressure and volume, which would fall under Boyle's law. The equation for Boyle's law is P1V1 = P2V2, where P1 and V1 represent the initial pressure and volume, and P2 and V2 represent the final pressure and volume. To solve for the unknown variable, you will need to rearrange the equation and plug in the given values.

For example, if you are given an initial pressure of 1 atm and an initial volume of 5 L, and the final pressure is 2 atm, you can solve for the final volume by rearranging the equation as V2 = (P1V1)/P2. Plugging in the values, you would get V2 = (1 atm * 5 L)/2 atm, which equals 2.5 L.

If you are still stuck, it might be helpful to review the gas laws and their equations, as well as practice solving different types of problems. Additionally, you can always seek help from your teacher, classmates, or a tutor for further clarification and guidance. I hope this helps you solve your gas laws problem. Best of luck!