1 / 6

Chapter 2

Chapter 2. Matter and Energy Pg 38 - 69. Energy. All physical and chemical changes involve a change in energy Energy goes in or energy comes out. If energy goes in it is endothermic Ice melting If energy comes out it is exothermic Water freezing, paper burning. Energy.

montana
Download Presentation

Chapter 2

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 2 Matter and Energy Pg 38 - 69

  2. Energy • All physical and chemical changes involve a change in energy • Energy goes in or energy comes out. • If energy goes in it is endothermic • Ice melting • If energy comes out it is exothermic • Water freezing, paper burning

  3. Energy • Law of conservation of energy • Energy cannot be created or destroyed • It can only change form from one type to another

  4. Heat • Heat is a form of energy • Heat is the amount of particle movement • The faster the particles move, the more heat there is • Heat makes the particles move faster • Kinetic energy is the energy of movement • Heat is the amount of kinetic energy the particles have

  5. Temperature • Different scales • We use Celsius and Kelvin • We use Kelvin in all calculations • K = oC + 273

  6. Scientific Notation • 602,000,000,000,000,000,000,000 is a very important number in chemistry • 6.02 x 1023 atoms in 1 mole of any substance • 0.00000000000000000000000001673 kg is the mass of 1 atom • 1.673 x 10-27 kg

More Related