How Do You Calculate the Average Square Speed of Argon Molecules?

[petar rezek]

Homework Statement

3. a) Calculate the mass of argon that at 13°C, in a volume of 50 liters, presses the walls with a pressure of 5.10¹ Pa.
b) What is the internal energy of the gas at that temperature?
c) What is the average square speed of the molecules? A, (Ar) = 39,948
needed help with question C)

Relevant Equations

pv=nRT
U=NEk=3/2NkT=3/2nRT

In the images you can see what I did I need someone to check answers and show me how to do C part of question

 

[phinds]

In addition to being annoyingly sideways, your images are unreadable. If you are going to ask people to do you the favor of helping you with something, you should make it easy for them, not hard.

 

[Bosko]

I recommend you using LaTex ( -> Learn LaTeX for Math Equations ) to write formulae.

 

[berkeman]

Homework Statement: 3. a) Calculate the mass of argon that at 13°C, in a volume of 50 liters, presses the walls with a pressure of 5.10¹ Pa.
b) What is the internal energy of the gas at that temperature?
c) What is the average square speed of the molecules? A, (Ar) = 39,948
needed help with question C)
Relevant Equations: pv=nRT
U=NEk=3/2NkT=3/2nRT

In the images you can see what I did I need someone to check answers and show me how to do C part of question

Welcome to PF.

Please start a new thread in the Homework Help, Introductory Physics forum, and type your work into the forum window using LaTeX for the equations. I will send you a Private Message (PM) now with some hints on how to use LaTeX.

When you repost, please also use a more descriptive thread title -- the title should reflect the question being asked in the thread. Thank you.