Today's chemistry class had us begin a new unit. We took the unit 5 test friday, so we started unit 6: Gases today. The first thing we did was meet in the chemistry lab to do a chemthink activity.

This link will take you to the chemthink website: http://chemthink.com/chemthink.html

*your login is your school i.d. and password

The Chemthink was on the Behavior of Gases. We started out with the tutorial which was very imformative.

*The first thing we learned was the effect temperature has on gases. As the temperature increases, gas particles begin to move faster, and when the temperature decreases, the particles move slower.

*The next thing we learned was the larger a particle is, the slower it moves. Take helium(He), neon(Ne), and argon(Ar). Argon, the largest particle, moves the slowest, Neon, the second largest, moves medium speed, and Helium, the smallest, moves the fastest.

As we continued through the chemthink, we learned that Pressure=Force/Area. Pressure also relates to Temperature, number of atoms, and volume.

This picture shows the relationship of how pressure varies directly with changes in temperature.

Formula: P/T=constant

This picture shows how pressure varies directly with the number of gas particles.

Formula: P/n=constant

This picture shows how pressure varies inversely with the volume of a gas sample

Formula: P*V=constant

This infomation is an overview of what the Chemthink was, and what the basics of the Gases unit are. After the Chemistry lab, we returned to the room and went over the previous nights webassign homework. The answers for page 27 in your unit packet are:

1. D

2. C

3.B

4.D

5.A

6.A

7.B

8.B

9.860

10. A

11.E

12.C

13.C

Notes from Class Discussion:

Volume (V)- Liters

=Amount of 3D space occupied by an object

*Further information can be found on page 7 in your book

Temperature (T)- Kelvin

=measure of the average amount of energy of motion (kinetic energy) of particles

*further information can be found on pages 7-8 in your book

Number of Moles (n)

1 mole=6.022 x 10^23

*further information can be found on page 55 in your book

Pressure (P)

=Force/unit area

=For gases, pressure results fromparticle collisions with container walls.

*further information can be found on page 104 in your book

Class then ended with Mr.H saying that we would finish going over problems 11-13 tomorrow, and that class the next day would have plenty of demonstrations regarding the new unit!