Download presentation

1
The Gas Laws 11.2

2
Boyle’s Law Boyle’s Law – the volume of a fixed mass of gas varies inversely with the pressure at constant temp. PV = k You can relate 2 different gases w/ k P1V1 = P2V2

3
Practice A sample of O2 gas has a vol of mL when it’s P is atm. What will the vol of the gas be at a P of atm if the T remains constant? Make sure both P and V units are the same!

4
Practice A balloon filled with He gas has a vol of 500 mL at a P of 1 atm. The balloon is released and reaches an altitude of 6.5 km, where the P is 0.5 atm. If the T has remained the same, what volume does the gas occupy at this height?

5
Temperature Absolute zero – the T of °C is given a value of 0 in the Kelvin scale. K = °C Charles’ Law = the vol of a fixed mass of gas at constant P varies directly with the Kelvin Temp

6
Charles’ Law V = kT V = k T V1 = V2 T1 = T2

7
Practice A sample of neon gas occupies a volume of 752 mL at 25°C. What V will the gas occupy at 50°C if the P is constant? A sample of N2 gas is contained in a piston w/a freely moving cylinder. At 0°C, the V of the gas is 375 mL. To what T must the gas be heated to occupy a V of mL?

8
Gay-Lussac’s Law The P of a fixed mass of a gas at constant V varies directly with the Kelvin T P = kT P = k T Set K equal to get… P1 = P2 T1 = T2

9
Practice The gas in a container is at a P of atm at 25°C. Directions on the container warn the user not to keep it in a place where the T exceeds 52°C. What would the P be at 52°C?

10
Practice At °C, the pressure of a sample of nitrogen is 1.07 atm. What will the pressure be at 205 °C, assuming constant volume. A sample of He gas has a P of atm at 22 °C. At what Celsius Temp will the He reach a P of 2.00 atm, assuming constant V.

11
The Combined Gas Law Combines Charles’, Boyle’s, and G-L CGL – expresses the relationship b/t P, V, and T of a fixed amt of gas PV = k P1V1 = P2V2 T T T2 T must be in Kelvin!!!!!

12
Practice A helium Balloon has a volume of L at 25°C and 1.08 atm. What V will it have at atm & 10.0°C? A mL gas sample at STP is compressed to a V of mL, and the T is increased to 30.0 °C. What is the new P of the gas in Pa? Complete S.R. on page 375 # 1-5

Similar presentations

OK

14.1 The Gas Laws > 1 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. Chapter 14 The Behavior of Gases 14.1 Properties of.

14.1 The Gas Laws > 1 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. Chapter 14 The Behavior of Gases 14.1 Properties of.

© 2018 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google