1. Warm-up Turn in your Specific Heat Lab!
Today you will need a periodic table and a calculator
What is an exothermic reaction? What is an endothermic reaction?

2. Reaction Diagrams
Enthalpy of Reactions

3. Exothermic Reactions Reactions that release heat energy
Temperature of surroundings increases
Heat is a
product
Enthalpy
(ΔHrxn) is
negative

4. Endothermic Reactions
Reactions that absorb heat energy
Temperature of surroundings decreases
Heat is a
reactant
Enthalpy
(ΔHrxn) is
positive

5. Practice Problem 1
How much heat will be released if 1.0 g of hydrogen peroxide decomposes in a bombardier beetle to produce a steam spray? 2 H2O2 (l)  2 H2O (l) + O2 (g) kJ

6. Practice Problem 2
How much heat is transferred when 9.22 g of glucose in your body reacts with the oxygen you inhale according to the equation below?
C6H12O6 (s) + 6 O2 (g)  6 CO2 + 6 H2O (l)
ΔHrxn = kJ

7. Practice Problem 3
How much heat is released when 2.5 moles of NaOH are dissolved in water?
NOTE: Dissolving is NOT a chemical reaction!
ΔHsoln = kJ/mol

8. Warm-up
I have NO voice today! Please get settled when the bell rings and be quiet so everyone can hear me.
Turn in your Phase Diagram Packet
Read the Enthalpy of Reaction Lab procedures!
Have your pre-lab out! (STAMP!)

9. Enthalpy of Reactions Lab
It is very difficult for me to get your attention with not voice. For everyone’s safety, we will NOT be conducting a lab today. Instead, we will use sample data.
Enthalpy PracticeDue Tomorrow
LabDue Monday

10. Warm-up
Write this on your warm-up sheet: Announcements *Test Corrections Due Friday. *Unit 8 Test Wednesday *Come to tutoring to get extra help on homework! 

11. Thermochemical Equations Practice Packet
Questions about Enthalpy Practice? (Due Today)
Problem examples in Reaction Diagrams notes (Enthalpy of Reaction).
DUE MONDAY!
Question 1c
Amounts of two different reactants are given…. Must find the LIMITING REACTANT!

12. Summary… Enthalpy Practice: Due Now
Specific Heat Lab: end of class. Fix Analysis if needed (you’re welcome )
Enthalpy of Reactions Pre-lab (1 question): Due tomorrow
Thermalchemical Equations Practice Packet: Due Monday

13. Enthalpy of Reaction Lab
You must wear goggles and aprons!
Gloves
Follow all directions carefully (read twice, pour once!!!!!)
Keep one hand out the coffee cup calorimeter at all times!!!