Chemistry Honors – Class 25

Ouch…

Dates

• Period A – Monday, March 3rd
• Periods C, D – Tuesday, March 4th

Lab Recap

• What values did you find?
• What challenges did you face?
• How would you improve the process?

New Material

• Enthalpy (H)
  • energy content of a substance
  • reactions produce energy changes when going from one form to another
  • Example with Peanut
  • Exothermic vs Endothermic
  • how to express this
• Examples
  • C2H5OH + 3O2 –> 2CO2 + 3H2O (DH = 1,300 kJ/mole)
  • How many joules of heat released when 100.0 grams burned?
  • What would the DT be for 250 grams of water? in a bomb calorimeter?

Homework

• Ch. 10 (41, 42, 80, 81)