density of air

Date view Thread view Subject view Author view

From: Paul Doherty (pauld@exploratorium.edu)
Date: Wed Nov 01 2000 - 13:03:55 PST 

Message-Id: <l03110786b626144f8d83@[192.174.2.173]>
Date: Wed, 1 Nov 2000 13:03:55 -0800
From: Paul Doherty <pauld@exploratorium.edu>
Subject: density of air

Pinholers

I checked on the density of air

at STP it is 1.293 kg/m^3

I usually remember it as about 1/800 the density of water.

This also means that when you have a liquid or solid, like dry ice, turn
into a gas it will turn into 800 times the volume at STP. This is why such
violent explosions can occur if you trap dry ice or liquid nitrogen in
closed containers.

Another way to remember it is that air is about 29 grams per mole and at
STP a mole occupies 22.4 Liters. so that makes 29 grams in 22.4 liters =
1.29 g/L

Paul D

Paul "But it is more complicated than that!" Doherty,
Senior Staff Scientist, The Exploratorium.
pauld@exploratorium.edu, www.exo.net/~pauld

Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Tue Oct 16 2001 - 12:21:59 PDT