July 16, 2019, 04:37:20 AM
Forum Rules: Read This Before Posting


Topic: How to calculate Water and N2 is mixed together  (Read 239 times)

0 Members and 1 Guest are viewing this topic.

Offline cloudy1290

  • Regular Member
  • ***
  • Posts: 37
  • Mole Snacks: +0/-0
How to calculate Water and N2 is mixed together
« on: June 22, 2019, 08:15:48 AM »
Water and N2 is mixed together in a container, dissolved amount of N2 is negligible (the container is  lid by a piston).

1. Initially, total pressure (N2+water) inside container and vapour pressure of H2O are given. Find partial pressure of N2

2. Later, press down the container to reduce its volume, then find new pressure at constant T

Do I have to use Raoult's law? or it's just Total Pressure = Partial Pressure of N2 + vapour pressure of H2O

For 2nd; P(of total, before pressing)V(before pressing) = P(after pressing)V(after pressing)

are these methods correct?
« Last Edit: June 22, 2019, 09:46:34 AM by cloudy1290 »

Offline cloudy1290

  • Regular Member
  • ***
  • Posts: 37
  • Mole Snacks: +0/-0
Re: How to calculate Water and N2 is mixed together
« Reply #1 on: June 22, 2019, 01:49:26 PM »
For 1, just got that Total pressure = Partial pressure of N2 + vapour pressure of H2O

But still have no idea for 2

Offline mjc123

  • Chemist
  • Sr. Member
  • *
  • Posts: 1594
  • Mole Snacks: +226/-10
Re: How to calculate Water and N2 is mixed together
« Reply #2 on: June 24, 2019, 05:25:11 AM »
How does the pressure of nitrogen vary with the volume at constant T?
How does the vapour pressure of water vary with the volume at constant T?

Sponsored Links