DO NOW (5 min)

1. DO NOW (5 min) You must be silent and working for credit Be on time Enter silently Grab papers Immediately start work No talking PUT YOUR HOMEWORK IN THE BIN How many days until we reach our big goal? According to Charles’ Law, if temperature goes up, volume will go _______ If I put a balloon over a hot flame, what would happen to the volume of the air in the balloon? What if I put it in the freezer? What would happen to the volume of the air in the balloon?

2. DO NOW REVIEW How many days until we reach our big goal? According to Charles’ Law, if temperature goes up, volume will go _______ If I put a balloon over a hot flame, what would happen to the volume of the air in the balloon? What if I put it in the freezer? What would happen to the volume of the air in the balloon?

3. DO NOW (5 min) You must be silent and working for credit Be on time Enter silently Grab papers Immediately start work No talking PUT YOUR HOMEWORK IN THE BIN How many days until we reach our big goal? According to Charles’ Law, if temperature goes down, volume goes ________ A mountain climber goes all the way up to the top of mount Everest where the pressure is very low. If he took a balloon up with him, what happens to the VOLUME of the balloon (up or down)? Write the equation for Charles’ Law Write the equation for Boyle’s Law

4. WATCH THIS • Boyle’s Law tells us about the relationship between volume and pressure– watch this simple demonstration • When I squeeze the ball, does pressure go up or down? • When I squeeze the ball, does volume go up or down? • So let’s make a rule, when pressure goes ________, volume goes _____________

5. BOYLE’S LAW This is known as Boyle’s Law Key Point #1: Boyle’s Law says: pressure increases = volume decreases. Pressure decreases = volume increases Thumbs  ?

6. Boyle’s Law – Quick Review! Key Point #1: Boyle’s Law describes the relationship between volume and pressure. Units don’t matter as long as they match: atm, torr, kPa Equation: Final Volume Initial Pressure Initial Volume Final Pressure

7. GUESS METHOD! A sample of oxygen gas occupies a volume of 25L at .97 atm. What volume will it occupy at 1.05 atm? G U E S S

8. A sample of Oxygen occupies a volume of 250mL at 2 atm. What volume will it occupy at 3 atm? A sample of carbon dioxide occupies a volume of 3.5L at 12 atm. What pressure would the gas exert if the volume was decreased to 2.00L Ammonia gas occupies a volume of 45L at a pressure of 7.2 atm. What volume will it occupy at 1 atm?

9. Practice Makes Perfect • Psychologists have done study after study that proves that….the more you practice – the better you’ll remember when it comes to test time! • Boyle’s Law Worksheet – you will have 20 minutes to work on it independently. • Independently means without input from others – the room should be quiet! • If you need help, check your notes first, and then raise your hand

10. FACE OFF! • Boyle’s Law versus Charles’ Law! • How to tell the difference? • Boyle’s Law deals with volume and pressure • Charles’ Law deals with volume and temperature

11. FLIP IT OVER! Turn your worksheet over and start working on the mixed practice problems Working on these problems mixed together will help you remember what equation to use come test time! NOW, you make work with a partner to do these problems You have fifteen minutes for these problems Due at the end of the period

12. DO NOW SIT DOWN SILENTLY IF YOU ARE NOT SILENT, WE WILL DO WORK INSTEAD THE PAPER YOU PICKED UP ON YOUR WAY IN IS YOUR HOMEWORK LET’S MAKE SURE WE KEEP OUR SPOT AS QUIZ CHAMPIONS