Was your Pressure Conversion Have these in your notebook: Warm-Up 1/17/14 Was your Pressure Conversion worksheet handed in? Have these in your notebook: 1 atm = 760 mm Hg 1 atm = 101.3 kPa 760 mm Hg = 101.3 kPa Solve this: 7.13 atm = _____ mm Hg = ____ kPa Will check four minutes after the bell.

Review Pressure unit conversions Objective -Understand the relationship between pressure and volume of gases (Boyle’s Law) Agenda Review Pressure unit conversions -PhET Findings Boyle’s Law

Review Warm-Up Solve this: 7.13 atm = _____ mm Hg = ____ kPa

Pressure Review

Pressure Review

Pressure Review

PhET Findings: P vs. V ↓V ↑P

PhET Findings: P vs. V ↑V ↓P

PhET Findings: P vs. V ↑V ↓P ↓V ↑P Boyle’s Law

Initial Pressure x Initial Volume = Final Pressure x Final Volume Boyle’s Law Used to find a change in pressure from a change in volume or vice versa. Initial Pressure x Initial Volume = Final Pressure x Final Volume P1V1 = P2V2 http://www.youtube.com/watch?v=RPlCO3AITV4

Boyle’s Law: P1V1 = P2V2 From the video, the pressure of the room was 30.15 mm Hg and the shaving cream occupied 0.050 L. After the vacuum was turned on, the shaving cream expanded to occupy 2.45 L. What was the pressure inside of the bell jar?

Boyle’s Law: P1V1 = P2V2 1. I have added 15 L of air to a balloon at sea level (1.0 atm). If I take the balloon with me to Denver, where the air pressure is 0.85 atm, what will the new volume of the balloon be?

Recap ↑V ↓P ↓V ↑P As volume increases, what happens to pressure? As volume decreases, what happens to pressure? ↓V ↑P

Exit Ticket I’ve got a car with an internal volume of 12,000 L. If I drive my car into the river and it implodes, what will be the volume of the gas when the pressure goes from 1.0 atm to 1.4 atm?

Homework