Activity 6: States of Matter and Intermolecular Forces

1. Convert 0°F, 32°F, 70°F, and 212°F to Kelvin

• 0°F: (0°F -32)*5/9+273.15 = 255.37K

• 32°F: (32°F -32)*5/9+273.15 = 273.15K

• 70°F: (70°F -32)*5/9+273.15 = 294.26K

• 212°F: (212°F -32)*5/9+273.15 = 373.15K

2. Complete the Teaching Idea: States of Matter Simulation Lab by Kelly Vaughan. Complete the lab worksheet as if you were a student, and then post this on your blog. You can scan it or just take a picture of it.

3. In the States of Matter simulation, choose the Solid, Liquid, and Gas Tab at the top of the screen. Choose the water molecule and cool the water to 0 K. Describe how the water molecules are aligned and attracted to each other. Which atoms are attracted to which other atoms?

• The water molecules lined up in a particular way. The hydrogen are attached to either other hydrogen or oxygen.

4. Switch to the Phase Changes Tab on the States of Matter simulation. Notice how on the bottom right there is a small red dot that indicates where the system is at as far as temperature, pressure and state of matter. Play with the simulation to notice changes, notice that when you push down the pressure can go way up and explode the box. On your blog, report a temperature and pressure required to make oxygen a liquid. This is sometimes how the oxygen exists in pressurized oxygen tanks, perhaps like ones you may use to go diving.

• Temperature: 135K

• Pressure: 3.35ATM

5. List and describe at least two Science Standards that this activity addresses.

• Science Standard A: Science Connections Performance Standards-Grade 8:
• A.8.1 Develop their understanding of science themes by using the themes to frame questions about science-related issues and problems 
• A.8.6 Use models and explanations to predict actions and events in the natural world

• Science Standard C: Science Inquiry Performance Standards- Grade 8
• C.8.8 Use computer software and other technologies to organize, process, and present their data