Download presentation

Presentation is loading. Please wait.

Published byXander Sheperd Modified over 3 years ago

1
Pressure and Temperature William Thomson “Lord Kelvin”

2
CA Standards

3
Measuring Pressure The first device for measuring atmospheric pressure was developed by Evangelista Torricelli during the 17 th century. The device was called a “barometer” Baro = weight Meter = measure

4
An Early Barometer The normal pressure due to the atmosphere at sea level can support a column of mercury that is 760 mm high.

5
Pressure Is caused by the collisions of molecules with the walls of a container is equal to force/unit area

6
Standard Pressure 1 standard atmosphere (atm) 1 standard atmosphere (atm) 101.3 kPa (kilopascals) 14.7 lbs/in2 760 mm Hg (millimeters of mercury) 760 torr

7
Pressure UnitSymbolDefinition/Relationship PascalPaSI pressure unit 1 Pa = 1 newton/meter 2 Millimeter of mercury mm HgPressure that supports a 1 mm column of mercury in a barometer AtmosphereatmAverage atmospheric pressure at sea level and 0 C Torrtorr1 torr = 1 mm Hg Pressure is the force created by the collisions of molecules with the walls of a container

8
The Kelvin Scale

9
Standard Temperature Standard Temperature equals: 273 Kelvin (273 K) 0 C

10
Converting Celsius to Kelvin Gas law problems involving temperature require that the temperature be in KELVINS! Kelvins = C + 273 °C = Kelvins - 273

11
Standard Temperature and Pressure “STP” Either of these: 273 Kelvin (273 K) 0 C Either of these: 273 Kelvin (273 K) 0 C And any one of these: 1 atm 1 atm 101.3 kPa 14.7 lbs/in 2 (psi) 760 mm Hg 760 torr And any one of these: 1 atm 1 atm 101.3 kPa 14.7 lbs/in 2 (psi) 760 mm Hg 760 torr

Similar presentations

Presentation is loading. Please wait....

OK

Gases.

Gases.

© 2018 SlidePlayer.com Inc.

All rights reserved.

By using this website, you agree with our use of **cookies** to functioning of the site. More info in our Privacy Policy and Google Privacy & Terms.

Ads by Google

Adrenal gland anatomy and physiology ppt on cells Ppt on fire fighting training Ppt on eye osiris Ppt on credit default swaps news Download ppt on home security system Ppt on pre ignition problems Free ppt on telephone etiquette Ppt on commerce education in india Download ppt on environmental problems in india Ppt on second law of thermodynamics examples