1. Hello! (January 10th) Pre-lab in lab books out, please!
Lab handout too
Warm-up in your notes:
150.5 gram sample of water is heated from 34.5 C to 41.2 C. How many Joules were absorbed by the water?
Hello! (January 10th)

2. q = mcΔT q = total heat transferred to or from (J)
m = mass of the substance in grams
c = heat capacity (J/g°C)
How many Joules does it take to raise 1 gram of the substance 1 degree Celsius?
c of water = J/g°C
ΔT = absolute value of change in temperature in the system (K or °C)
Note – we can’t measure total HEAT, we can only measure heat transfer through calorimetry (transferring to water)
q = mcΔT

3. Calorimetry! Standard Calorimeter Bomb Calorimeter
Coffee Cup Calorimeter
Calorimetry!

4. Today!
Unknown Heat Capacity Lab #9: find the heat capacity of the metal washer

5. q lost by metal = q gained by water
How to find the unknown c:
Calculate the specific heat capacity (c) for the metal using the ΔT and mass of the metal and the ΔT, of water, and mass of the water
Only one unknown variable! (Cmetal)
q lost by metal = q gained by water
m c ΔT = m c ΔT

6. HOMEWORK DAY 2 Post-Lab in your lab book for Fri
Remember LABEL, SHOW FORMULA, SHOW WORK for all calculations! Be detailed and awesome!
Read and notes: Chapter 5, pgs (HL )
Review about exo and endothermic reactions
Heat flow
Heat capacity
Example calculations (helpful for Lab 9)
HOMEWORK DAY 2

7. Watch this video on heat capacity, specific heat, and calorimetry so you understand Lab 9!
He calls heat capacity s instead of c, but it’s the same equation!
Do the practice problem at the end in your notes, too!
Calorimetry Video