Heats Of Reactions2

368 views

Published on

Published in: Business, Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
368
On SlideShare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
5
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Heats Of Reactions2

  1. 1. HEATS OF REACTIONS · MIREIA JIMÉNEZ ROSÉS · DAVID VÁZQUEZ CALDERERO ·
  2. 2. <ul><li>INTRODUCTION & SAFETY </li></ul><ul><li>EXPERIMENT 1 </li></ul><ul><li>EXPERIMENT 2 </li></ul><ul><li>QUESTIONS </li></ul>MENU
  3. 3. INTRODUCTION <ul><li>SOME REACTION GIVE OUT HEAT AND OTHER TAKE IN HEAT. </li></ul><ul><li>THEIR NAMES ARE: </li></ul><ul><li>IN EXOTHERMIC REACTIONS , THE TEMPERATURE GOES UP BECAUSE IT TRANSFERS HEAT FROM THE SURROUNDING. </li></ul><ul><li>IN ENDOTHERMIC REACTIONS , THE TEMPERATURE GOES DOWN BECAUSE IT ABSORBS HEAT FROM THE SORROUNDING. </li></ul><ul><li>WEAR EYE PROTECTION FOR DO THE NEXT EXPERIMENTS. </li></ul><ul><li>ZINC POWDER IS FLAMMABLE. </li></ul><ul><li>CLORHIDRIC ACIS IS AN ACID CORROSIVE. </li></ul>SAFETY
  4. 4. EXPERIMENT 1 MATERIALS THERMOMETER SPATULA GRADUATED CYLINDER TEST TUBE TEST TUBE RACK POWER ZINC CLORHIDRIC ACID
  5. 5. PROCEDURE 1. PUT ABOUT 5 CM 3 OF CLORHIDRIC ACID. 2. RECORD THE TEMPERATURE OF THE CLORHIDRIC ACID. 3. ADD A SPATULA OF POWDERED ZINC. 4. WATCH WHAT HAPPENS AND TAKE THE TEMPERATURE OF THE SOLUTION.
  6. 6. EXPERIMENT 2 MATERIALS SODIUM HYDROGENCARBONATE CITRIC ACID TEST TUBE TEST TUBE RACK THERMOMETER SPATULA GRADUATED CYLINDER
  7. 7. PROCEDURE 1. IN A DRY TEST TUBE MIX ONE SPATULA OF CITRIC ACID AND ONE SPATULA OF SODIUM HYDROGENCARBONATE. 2. PUT 2 CM 3 OF WATER IN ANOTHER TEST TUBE. 3. RECORD THE TEMPERATURE OF THE WATER. 4. ADD THE MIXTURE TO THE WATER. 5. WATCH WHAT HAPPENS AND TAKE THE TEMPERATURE OF THE SOLUTION.
  8. 8. QUESTIONS INFORMATION NOW DO IT: 1. WHICH REACTION IS EXOTHERMIC AND WHICH ENDOTHERMIC? 2. WRITE WORD AND SYMBOL EQUATIONS FOR EXPERIMENT 1. 3. WRITE WORD EQUATION FOR EXPERIMENT 2. The reaction 1 is EXOTHERMIC, because the temperature increase 23.5ºC. The reaction 2 is ENDOTHERMIC, because the temperature decrease 10ºC. Clorhidric acid + zinc  zinc chloride 2 HCl+ Zn  ZnCl 2 + 2 H Sodium hydrogencarbonate + citric acid  sodium citrate + water + carbon dioxide EXPERIMENT TEMPERATURE OF LIQUID FINAL TEMP. OF MIXTURE TEMPERATURE CHANGE 1 21ºC 44.5ºC +23.5ºC 2 21ºC 12ºC -10ºC
  9. 9. END

×