Welcome to Chem 102, as we are 2 weeks in already it is time I updated the blog.

This is the spot where I post summaries of the material we have covered along with any links to websites and learning resources that I used in class.

This week we finished up Gases and began thermochemistry.

You should all be comfortable with the Gas Laws and be able to:
· Apply the ideal gas law to calculate the properties of gases under a variety of conditions, pressures, temperatures, volumes and amounts: PV=nRT
· Be able to convert pressures between different units
· Carry the units through equations and make sure you are using the correct gas constant
· Calculate the gas produced in chemical reactions and figureout how much reactant is required to give that much gas
· Collecting gases over water- factoring the water vapor pressure
· Calculate densities and Molar Masses of gases using the derived form of the ideal gas equation
· Describe the kinetic-molecular theory and explain the difference between real and ideal gases
· Under what conditions do real gases deviate most from ideal behavior (low temperature and high pressure).
· Be able to use the Van der Waals equation
· Remember to always check your answer- Does it seem right? If not check your units.

Here are a couple of links

You tube – collapsing can demo

http://www.youtube.com/watch?v=ZGhAeG13MTI&feature=related

Want to fill your tires with Nitrogen?

http://www.straightdope.com/columns/read/2694/is-it-better-to-fill-your-tires-with-nitrogen-instead-of-air

A site all about gases with demos and questions (I haven’t checked it all out so I’m not guaranteeing its quality!)

http://www.nclark.net/GasLaws

Remember to have a go at questions in the book, the best way to study for 102 is to do practice questions...Check out the learning commons schedule for help sessions. There are past exam questions at the back of your lab manual

http://web.uvic.ca/~chem102/learncom.html

Next up, thermochemistry

All about the transformation of energy in chemical reactions, in terms of heat and work!

Who’s doing the work ..the system or the surroundings?
Who’s gaining heat, who’s losing heat?
Remember to get signs correct

Well done to the eagle eye spotter who noticed the mistake on slide 7? And consequently in the book section 5.2, The second diagram: the system is gaining energy from the surroundings so E of system increases, not decreases as the diagram states.

Here are a couple of links

The unfortunate chemistry teacher under-estimating the potential energy sin bonds (acetylene)

http://www.youtube.com/watch?v=HUVNf-y349E&feature=related

The thermite reaction (Exothermic)

http://jchemed.chem.wisc.edu/JCESoft/CCA/samples/cca7thermite.html

If you have any questions feel free to send me an email, my contact information along with calendars etc is on my page
http://web.uvic.ca/~chem102/LEE/

I shall try and get the environment notes Chapter 18 on the page this weekend,
You should be able to do Online quiz 1 now. Don’t forget to do these quizzes they count for 9% of your final mark this time!