1. Heat and Energy!
Created by Educational Technology Network

2. Heat
Definition
Endo vs. Exo
Variables
Rx Rate 10 10 10 10 10 20 20 20 20 20 30 30 30 30 30 40 40 40 40 40 50 50 50 50 50

3. Topic 1 – 10 Points What are the units for heat? QUESTION: ANSWER:
Joules or Kilojoules

4. Topic 1 – 20 Points Energy QUESTION: ANSWER:
Heat is defined as the transfer of _______ .
ANSWER:
Energy

5. Topic 1 – 30 Points
QUESTION:
If we increased the number of moles of CO2 in the reaction to 4, how much energy would we need?
2CO2(g) kJ  2C(s) + O2(g)
ANSWER:
967.2 kJ

6. Topic 1 – 40 Points
QUESTION:
What three things are needed to calculate the heat gained by an object?
ANSWER:
mass, specific heat of object, change in temp of object

7. Topic 1 – 50 Points
QUESTION:
If you set your hand on an active hot plate, explain what happens to your hand at the molecular level.
ANSWER:
Large amounts of energy in the form of heat are being transferred to your hand which increases the average kinetic energy of the molecule.

8. Topic 2 – 10 Points QUESTION: ANSWER: Thermochemistry
The study of energy transfers as heat.
ANSWER:
Thermochemistry

9. Topic 2 – 20 Points
QUESTION:
The measure of average Kinetic energy of particles.
ANSWER:
Temperature

10. Topic 2 – 30 Points
QUESTION:
Changes the rate of a reaction but is not consumed in the process
ANSWER:
catalyst

11. Daily Double Topic 2 – 40 Points
QUESTION:
Quantity of heat needed to raise the temp of 1 gram of a substance by 1℃ or 1K
ANSWER:
Specific Heat
Daily Double

12. Topic 2 – 50 Points Energy required for a reaction to occur. QUESTION:
ANSWER:
Activation Energy

13. Topic 3 – 10 Points Heat is absorbed during the reaction. QUESTION:
ANSWER:
endothermic

14. Topic 3 – 20 Points This reaction feels cold QUESTION: ANSWER:
Endothermic

15. Topic 3 – 30 Points
QUESTION:
- H
ANSWER:
Exothermic

16. Topic 3 – 40 Points 2H2O(g) + 483.6 kJ  2H2(g) + O2(g) QUESTION:
ANSWER:
Endothermic

17. Topic 3 – 50 Points
QUESTION:
ANSWER:
Exothermic

18. Topic 4 – 10 Points
QUESTION:
What is the variable for heat?
ANSWER: Q

19. Topic 4 – 20 Points c or cp What is the variable for specific heat?
QUESTION:
What is the variable for specific heat?
ANSWER:
c or cp

20. Topic 4 – 30 Points What is K? Temperature in Kelvins QUESTION:
ANSWER:
Temperature in Kelvins

21. Topic 4 – 40 Points activation energy QUESTION: ANSWER:
What does Ea mean?
ANSWER:
activation energy

22. Topic 4 – 50 Points
QUESTION:
What does ΔS mean?
ANSWER:
Entropy

23. Topic 5 – 10 Points QUESTION: ANSWER:
Lowering the temperature has what effect on reaction rate?
ANSWER:
Decrease Rx rate

24. Topic 5 – 20 Points QUESTION: ANSWER:
Increasing the concentration of the subject chemical should have what effect on the reaction rate?
ANSWER:
Increased Rx Rate

25. Topic 5 – 30 Points
QUESTION:
Name four of the five factors that affect reaction rate.
ANSWER:
Surface Area, Nature of Reactants, Catalyst, Temperature, Concentration

26. Topic 5 – 40 Points
QUESTION:
Particles must collide with enough energy and force at a proper orientation in order for a reaction to occur. Name the theory.
ANSWER:
Collision Theory

27. Topic 5 – 50 Points
QUESTION:
A catalyst lowers the _________ ________ of a reaction
ANSWER:
Activation energy

28. Final Jeopardy Question: Given:
N2 (g) + O2 (g)  2 NO (g) ΔH = kJ
N2 (g) + 3 H2 (g)  2 NH3 (g) ΔH = kJ
2 H2 (g) + O2 (g)  2 H2O (g) ΔH = kJ
Find:
4 NH3 (g) + 5 O2 (g)  4 NO (g) + 6 H2O (g)
Answer:
ΔH = kJ