Download presentation

Presentation is loading. Please wait.

Published byMorgan Brumitt Modified about 1 year ago

1
Aim: How to convert from moles to volume and vice versa

2
Avogardo’s Hypothesis Avogadro's hypothesis says that the same volume of gas contains the same number of particles. It does not matter what gas you have, they all contain the same number of particles provided that they are at the same temperature and pressure.

3
STP Volume of gas and temperature are usually measured at STP. Standard temperature and pressure (STP) means temperature of 0 o C and a pressure of 101.3 kPa, or 1 atmosphere (atm). At STP, 1 mole or 6.02 x 10 23 representative particles of any gas occupies a volume of 22.4 L.

6
Calculating from moles of gas to volume of gas Conversion Factor

7
Calculating the volume of a gas at STP Determine the volume, in liters, of 0.60 mol SO 2 gas at STP. 1. Identify known and unknown. KnownUnknown 1 mol = 22.4 Lvolume of 0.60 mol SO 2 0.60 mol SO 2

9
What is the volume of these gases at STP? a. 3.20 x 10 -3 mol CO 2 3.20 x 10 -3 mol CO 2 x 22.4 L / 1 mol = 0.0717 L CO 2 b. 3.70 mol N 2 3.70 mol N 2 x 22.4 L / 1 mol = 82.9 L N 2

10
Converting from volume of gas to moles of gas Conversion Factor

11
Calculating number of moles of a gas at STP How many moles of helium at STP will fit into a 39.6 L container? 1. Identify known and unknown. KnownUnknown 1 mol = 22.4 L# of moles 39.6 L

13
How many moles of argon atoms are present in 11.2 L of argon gas at STP? 11.2 x 1mol / 22.4 L = 0.500 moles

14
Calculating Molar Mass From Density Molar Mass density Molar volume

15
Calculating molar mass of gas at STP The desnity of a gaseous compound containing carbon ad oxygen is found to be 1.964 g/L at STP. What is the molar mass of this compound. 1. List known and unknown. KnownUnkown Density = 1.964 g/Lmolar mass ? 1 mol = 22.4 L

17
What is the density of krypton gas at STP

Similar presentations

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google