Gas pressure force

  • Thread starter ice87
  • Start date
  • #1
ice87
25
0
A cubic metal box with sides of length 20cm contains air at pressure of 1atm and a temperature of 300K. The box is sealed so that the volume is constant and heated to 400K. What is the net force on each side of the box?

thanks dudes.
 

Answers and Replies

  • #2
Pengwuino
Gold Member
5,124
17
Use PV=nRT
 
  • #3
quantumdude
Staff Emeritus
Science Advisor
Gold Member
5,575
23
You'll also need the definition of pressure. It's a force divided by an area.
 
  • #4
SpaceTiger
Staff Emeritus
Science Advisor
Gold Member
2,957
4
Yes, this is related to the ideal gas law (Pengwuino's formula), but really, all you need to know is the proportionality:

[tex]\frac{P_2}{P_1}=\frac{T_2}{T_1}[/tex]

To see why, consider that both before and after the gas is heated, it must satisfy the ideal gas law. Now, look at which variables are the same both before and after. Does the volume change? What about the number of particles in the box? Certainly the gas constant isn't going to change.

Once you determine the pressure, do you know the relationship between pressure and force?
 

Suggested for: Gas pressure force

Replies
10
Views
139
Replies
33
Views
640
  • Last Post
Replies
8
Views
870
Replies
16
Views
387
  • Last Post
Replies
3
Views
358
Replies
10
Views
639
  • Last Post
Replies
4
Views
565
Replies
23
Views
1K
  • Last Post
Replies
6
Views
531
Top