My Math Forum  

Go Back   My Math Forum > Science Forums > Physics

Physics Physics Forum


Reply
 
LinkBack Thread Tools Display Modes
November 7th, 2016, 07:47 AM   #1
Member
 
Joined: Oct 2016
From: Slovenia, Europe

Posts: 47
Thanks: 5

Question partial air pressure task. help please

calculate the density of air at the temperature 15°C (=288K) and at the pressure 99.5 kPa. Structure of the air is: 80% of volume is nitrogen, 20% of volume is oxygen. I am having problem with this task. Is there any correlation between partial pressure and partial volume?
I already know that:
density(air)= ( m(N2)+m(O2) ) / V
srecko is offline  
 
November 7th, 2016, 09:57 AM   #2
Global Moderator
 
Joined: Dec 2006

Posts: 17,728
Thanks: 1360

Are you given the value of the universal gas constant?
skipjack is online now  
November 7th, 2016, 10:19 AM   #3
Member
 
Joined: Oct 2016
From: Slovenia, Europe

Posts: 47
Thanks: 5

Well, it is not given, but we are supposed to know that R= 8.314 kPa L mol-1K-1
srecko is offline  
November 7th, 2016, 10:28 AM   #4
Member
 
Joined: Oct 2016
From: Slovenia, Europe

Posts: 47
Thanks: 5

http://pho.to/ASPHF I already know that, but I do not know how to continue....
srecko is offline  
November 7th, 2016, 10:47 AM   #5
Global Moderator
 
Joined: Dec 2006

Posts: 17,728
Thanks: 1360

Calculate the specific gas constant for the gas mixture specified in the question, so that you can then use density = pressure/(specific gas constant × absolute temperature).
skipjack is online now  
Reply

  My Math Forum > Science Forums > Physics

Tags
air, partial, pressure, task



Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
partial air pressure srecko Chemistry 1 January 8th, 2017 07:02 AM
Pressure equation Studentno666 Physics 3 July 13th, 2015 02:17 AM
fluid pressure hobilla Pre-Calculus 4 March 21st, 2015 05:11 AM
The lowest pressure Phatossi Physics 1 June 17th, 2012 12:29 PM





Copyright © 2017 My Math Forum. All rights reserved.