• Support PF! Buy your school textbooks, materials and every day products via PF Here!

Gas laws

this is my webassign question for this week but i'm a little confused about the first part...
for part a) shouldn't the ratio just be 1 to 1, since the piston is exactly in the center?? or did i understand that wrong? i'm not all that great at chem especially when it comes to chem and physics together...
:eek:

A cylinder closed at both ends has a piston in between that is free to slide. At 22°C, the piston is exactly in the center when hydrogen gas is in one end and helium in the other.

(a) What is the ratio of the number of hydrogen molecules to the number of helium molecules?


(b) Where will the piston be if the temperature is raised to 59°C?
the choices:
in the same place
0.22 L to the left
0.44 L to the right
0.22 L to the right
0.44 L to the left


for part a) shouldn't the ratio just be 1 to 1, since the piston is exactly in the center?? or did i understand that wrong? i'm not all that great at chem especially when it comes to chem and physics together...
 

Chi Meson

Science Advisor
Homework Helper
1,767
10
PV=NkT

If the piston is in the center, and it doesn't move, then pressures on both sides are equal. What else must be equal? V? T? N? (yup, yup, yup).

Sometimes it's the simple ones that seem so hard.

Part b) should be easy now.
 
thanks, i just figured the question was trying to trick me like they usually do...
 

Related Threads for: Gas laws

  • Posted
Replies
17
Views
2K
  • Posted
Replies
1
Views
825
  • Posted
Replies
4
Views
2K
  • Posted
Replies
8
Views
4K
  • Posted
Replies
5
Views
2K
  • Posted
Replies
2
Views
4K
  • Posted
Replies
9
Views
14K
  • Posted
Replies
3
Views
875

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top