OCR Newtonian World - Ideal Gases, June 2014 Q6 Watch

danbroown
Badges: 1
Rep:
?
#1
Report Thread starter 3 years ago
#1
This paper here: http://www.ocr.org.uk/Images/243745-...nian-world.pdf

Question 6 part c, in the mark scheme to solve this question you need to state that

Pressure = mass/volume,
&
number of moles = mass/molecular mass

and then rearrange and substitute them into the ideal gas equation to get the answer required. However what is confusing me is that isn't density = mass/volume. So where does the statement pressure = mass/volume come from?
Could anybody explain this, would be greatly appreciated as my exam is tomorrow.

Mark scheme: http://www.ocr.org.uk/Images/236084-...world-june.pdf

Thanks a lot if anybody can help with this
0
reply
Teenie2
Badges: 11
Rep:
?
#2
Report 3 years ago
#2
It's not pressure = mass / volume it's density = mass / volume (i.e. rho not P)
1
reply
0le
Badges: 20
Rep:
?
#3
Report 3 years ago
#3
Yup, for the scheme you posted, it shows density. Are you using an up to date adobe reader to view this pdf file?
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • Bournemouth University
    Clearing Open Day Undergraduate
    Wed, 31 Jul '19
  • Staffordshire University
    Postgraduate open event - Stoke-on-Trent campus Postgraduate
    Wed, 7 Aug '19
  • University of Derby
    Foundation Open Event Further education
    Wed, 7 Aug '19

Are you tempted to change your firm university choice now or on A-level results day?

Yes, I'll try and go to a uni higher up the league tables (132)
18.67%
Yes, there is a uni that I prefer and I'll fit in better (72)
10.18%
No I am happy with my course choice (402)
56.86%
I'm using Clearing when I have my exam results (101)
14.29%

Watched Threads

View All