Energy – The capacity for doing work The ability to change matter.
-
Upload
beverley-alexandra-boyd -
Category
Documents
-
view
213 -
download
0
Transcript of Energy – The capacity for doing work The ability to change matter.
![Page 1: Energy – The capacity for doing work The ability to change matter.](https://reader030.fdocuments.us/reader030/viewer/2022032702/56649cee5503460f949bc384/html5/thumbnails/1.jpg)
![Page 2: Energy – The capacity for doing work The ability to change matter.](https://reader030.fdocuments.us/reader030/viewer/2022032702/56649cee5503460f949bc384/html5/thumbnails/2.jpg)
• Energy –
The capacity for doing work
The ability to change matter
![Page 3: Energy – The capacity for doing work The ability to change matter.](https://reader030.fdocuments.us/reader030/viewer/2022032702/56649cee5503460f949bc384/html5/thumbnails/3.jpg)
Energy• Radiant energy – solar energy or
electromagnetic spectra energy
![Page 4: Energy – The capacity for doing work The ability to change matter.](https://reader030.fdocuments.us/reader030/viewer/2022032702/56649cee5503460f949bc384/html5/thumbnails/4.jpg)
Energy• Radiant energy – solar energy or
electromagnetic spectra energy
• Thermal energy – energy associated with the random motions of atoms and molecules. (heat energy)
![Page 5: Energy – The capacity for doing work The ability to change matter.](https://reader030.fdocuments.us/reader030/viewer/2022032702/56649cee5503460f949bc384/html5/thumbnails/5.jpg)
Energy• Radiant energy – solar energy or
electromagnetic spectra energy
• Thermal energy – energy associated with the random motions of atoms and molecules. (heat energy)
• Chemical energy – energy released as a reaction occurs (stored energy in a molecule) (discuss explosions, natural gas etc.)
![Page 6: Energy – The capacity for doing work The ability to change matter.](https://reader030.fdocuments.us/reader030/viewer/2022032702/56649cee5503460f949bc384/html5/thumbnails/6.jpg)
Energy• Radiant energy – solar energy or
electromagnetic spectra energy• Thermal energy – energy associated with the
random motions of atoms and molecules. (heat energy)
• Chemical energy – energy released as a reaction occurs (stored energy in a molecule) (discuss explosions, natural gas etc.)
• Potential energy – energy due to position
![Page 7: Energy – The capacity for doing work The ability to change matter.](https://reader030.fdocuments.us/reader030/viewer/2022032702/56649cee5503460f949bc384/html5/thumbnails/7.jpg)
Energy• Radiant energy – solar energy or
electromagnetic spectra energy• Thermal energy – energy associated with the
random motions of atoms and molecules. (heat energy)
• Chemical energy – energy released as a reaction occurs (stored energy in a molecule) (discuss explosions, natural gas etc.)
• Potential energy – energy due to position• Kinetic energy – energy of motion
![Page 8: Energy – The capacity for doing work The ability to change matter.](https://reader030.fdocuments.us/reader030/viewer/2022032702/56649cee5503460f949bc384/html5/thumbnails/8.jpg)
Systems
System – specific part of the universe that is of
interest or being studied
Surroundings – everything else
![Page 9: Energy – The capacity for doing work The ability to change matter.](https://reader030.fdocuments.us/reader030/viewer/2022032702/56649cee5503460f949bc384/html5/thumbnails/9.jpg)
Systems• Open system – can exchange mass
and energy• Closed system – can transfer energy
but not mass• Isolated system – cannot transfer
mass or energy
![Page 10: Energy – The capacity for doing work The ability to change matter.](https://reader030.fdocuments.us/reader030/viewer/2022032702/56649cee5503460f949bc384/html5/thumbnails/10.jpg)
Energy
1st law of thermodynamics – Energy can be converted from one form to another but cannot be created or destroyed
• Exothermic – reaction that gives off energy – gets warmer to touch
• Endothermic – reaction that absorbs energy – gets cooler to touch
![Page 11: Energy – The capacity for doing work The ability to change matter.](https://reader030.fdocuments.us/reader030/viewer/2022032702/56649cee5503460f949bc384/html5/thumbnails/11.jpg)
• Activation Energy (Ea) Energy needed to get a chemical reaction to start
![Page 12: Energy – The capacity for doing work The ability to change matter.](https://reader030.fdocuments.us/reader030/viewer/2022032702/56649cee5503460f949bc384/html5/thumbnails/12.jpg)
E
EaA + BC
Time
Exothermic Endothermic
A + B C + Energy
E
EaA + BC
Time
A + B +Energy C
![Page 13: Energy – The capacity for doing work The ability to change matter.](https://reader030.fdocuments.us/reader030/viewer/2022032702/56649cee5503460f949bc384/html5/thumbnails/13.jpg)