5.7 and 5.8 Starter. Find out the names of the processes. Research on the internet if necessary. No need to blog this.Dear 11.1X,Instructions for Objective 5.7 and 5.81.
2. 5.7 and 5.8. Forward this e-mail to your blog and type the answers into the e-mail.
3. 5.7 and 5.8 Experiment. I’m afraid you can’t do the expt until we get back but watch the video clip to see how it’s set up and have a look at the graph of the results.
4. 5.7 to 5.10 Plenary 1. Play the attached “States of Matter”
5. 5.7 to 5.10 Plenary 2. Play the attached “Fill the trucks”
6. PhET States of matter simulation - embedding into your Posterous blog. Embed in your blog and then have a play
5.7 and 5.8 Starter28 October 201111:00· What are the 6 processes shown by the arrows?
5.7 and 5.828 October 201110:20·5.7 understand that a substance can change state from solid to liquid by the process of melting· 5.8 understand that a substance can change state from liquid to gas by the process of evaporation or boiling· Questions from Collins p.112· Answer in Bullet Points!
Q1
a) - Solids have a regular pattern of molecule arrangement, which ives them structural stability
- Solids have strong intermolecular bonds, meaning that it takes alot of energy to break these molecules apart
- Molecules in Liquid and gases can flow over each other as they are fluids -> Solids keep their shape
b) - Solids and liquids have stronger intermolecular bonds, therefore the molecules within these states are more densely packed together
- Mass = Volume x Density
- Liquids have a very low density, therefore they are lighter than solids or liquids.
- Gases fill their containers because molecules in this state have the most kinetic energy, so they move about very fast and in random directions
- This movement means that they push out in equal directions therefore 'filling their container'; solids and liquids do not have this energy, or random movement, so this does not occur.
Q3
- When a liquid reaches it's boiling point, the average kinetic energy (temperature) is enough to make all molecules transition into the gaseous phase
- Molecules at the bottom of the liquid have enough kinetic energy, but they are suppressed by the molecules above them
- Evaporation only occurs at the surface of the liquid, where there are no suppressing molecules, so these molecules can 'break away' from the intermolecular forces and become gas particles
LEARN: Evaporation is like boiling at the surface.
·Use following pages from Collins as a resource to help you
5.7 and 5.8 Experiment - Cooling Curve of Stearic Acid using datalogger15 October 201014:34
5.7 to 5.10 Plenary 128 October 201112:19
5.7 to 5.10 Plenary 228 October 201112:19
Extension: Play the Level 2 game to extend your knowledge about changes of phase!PhET States of matter simulation - embedding into your Posterous blog28 October 201111:14· Create a post
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