Lesson 9
Enthalpy Calculations
Learning Intention: Process how to do enthalpy calculations.
Success Criteria
16. I can calculate energy changes using ΔrH, reaction stoichiometry, and bond enthalpy.
a. Grams to energy
b. Energy to grams
c. Energy to volume (concentration)
Learning Tasks
Do Now (Day 1): Freon-11, CCl3F, works as a refrigerant in a refrigerator by evaporating, as shown in the equation below. (Answer)
CCl3F (l) --> CCl3F (g) ΔH = + 25.2 kJ mol-1
Draw an labelled energy diagram for the evaporation of freon-11, showing reactants, products, and change in enthalpy.
Review moles, mass, molecular mass and stoichiometry (from titration) by completing the following pages.
Basic Mole Concepts (page 108/110)
Moles, Mass and Molecular Mass (page 109/111)
The Law of Multiple Proportions (page 110/112)
Copy down Ms Garlick's notes on enthalpy calculations. There are two versions and today we will do mass --> energy. She will use the 2022 Exam Question 2b to teach this process (Blank 2022 Exam, 2022 Marking Schedule).
Mahi Choice
Work on the following sciPAD pages - Thermochemical Calculations (pages 111-115/113-117), questions 1, 2, 3a&b, and 4 a&b. - Remember, you don't need to do all the questions, just want you need to until you feel confident with the material
Work on the No Brain Too Small Energy Collated Questions
Do Now (Day 2): Week 10 Check-In. Random Question: Which is the best cut of french fry?
Copy down Ms Garlick's notes on the second version of enthalpy calculations, energy ---> mass. She will use the 2022 Exam Question 3c to teach this process (Blank 2022 Exam, 2022 Marking Schedule).
Mahi Choice
Work on the following sciPAD pages - Thermochemical Calculations (pages 111-115/113-117). - Remember, you don't need to do all the questions, just want you need to until you feel confident with the material.
Work on the No Brain Too Small Energy Collated Questions
Work on "CPR" Quiz #6 - Enthalpy Calculations (Answers)
Homework
This lesson took place on Friday, September 20th, 2024, Term 3 Week 9 and Monday, September 23rd, 2024, Term 3 Week 10. The latter is when this page was last update.d