2. Energy Chapter 10 JEOPARDY

3. CalorimetryVocabEnergy Specific Heat Capacity Hess’s Law 100 200 300 400 500

4. Calorimetry 100 An insulated device used to determine the heat associated with a chemical reaction A: What is a Calorimeter? S2C06 Jeopardy Review

5. Calorimetry 2 00 A: What is an endothermic process? The process described here S2C06 Jeopardy Review Reactants + energy  Products

6. Calorimetry 300 A: What is a calorie (or 4.184J) ? The quantity of energy required to heat one gram of water by one Celsius degree S2C06 Jeopardy Review

7. Calorimetry 400 A: What are 251 J ? The joule equivalent to 60.1 calories S2C06 Jeopardy Review

8. Calorimetry 500 A: What is 49 o C ? (4.18)(125)(68-x) = (2.22)(138)(x-17) x = 49ºC The thermal equilibrium temperature if 125 g of water at 68 o C is mixed with 138 g of gasoline at 17 o C ? c water = 4.18J/gC; c gas = 2.22J/gC S2C06 Jeopardy Review

9. Vocabulary 100 A: What is the First Law of Thermodynamics? S2C06 Jeopardy Review A law stating that the energy of the universe is constant

10. Vocabulary 200 A: What is heat? Energy transferred between two objects due to a temperature difference between them S2C06 Jeopardy Review

11. Vocabulary 300 A: What is potential energy? Energy due to position or composition S2C06 Jeopardy Review

12. Vocabulary 400 A: What is internal energy ? The sum of the kinetic and potential energies of all components of an object (ΔE = q + w) S2C06 Jeopardy Review

13. Vocabulary 500 A: What is a state function? A property of the system that changes independent of pathway S2C06 Jeopardy Review

14. Energy 100 A: What is petroleum? S2C06 Jeopardy Review A thick, dark liquid composed mostly of hydro-carbon compounds

15. Energy 200 A: What is the Greenhouse Effect? A warming effect exerted by certain molecules in the earth’s atmosphere (particularly carbon dioxide and water) S2C06 Jeopardy Review

16. Energy 300 A: What is coal? Formed from the remains of plants that were buried and subjected to high pressure and heat over long periods of time S2C06 Jeopardy Review

17. Energy 400 A: What is 13.4 calories? Calories of energy that correspond to 56.2 joules S2C06 Jeopardy Review

18. Energy 500 A: What is wind energy ? A form of renewable energy that has been used for several millennia and is currently being harvested across farmlands S2C06 Jeopardy Review

19. Specific Heat Capacity 100 A: What is specific heat capacity? S2C06 Jeopardy Review The amount of heat required to raise the temperature of one gram of substance by one degree Celsius.

20. Specific Heat Capacity 200 A: What is 526 J? S2C06 Jeopardy Review The amount of heat energy (in joules) needed to raise the temperature of 7.40 g of water from 29.0°C to 46.0°C

21. Specific Heat Capacity 300 A: What are J/g o C ? The units for specific heat capacity? S2C06 Jeopardy Review

22. Specific Heat Capacity 400 S2C06 Jeopardy Review A: What are 1.77 X 10 5 J ? The joules of energy required to heat 454g of water from 5.40°C to 98.6°C ? 4.18 J x 454 g x 93.2°C = 1.77 X 10 5 J g °C

23. Specific Heat Capacity 500 S2C06 Jeopardy Review A: What are 314,000 J (or 314 kJ) ? The amount of energy as heat that is required to raise the temperature of 1.00 L of water from 25.0 C to boiling 4.18 J x 1000 g x 75.0°C = 313,500 J g °C

24. Hess’s Law 100 A: What is enthalpy ( ΔH) ? The change in heat that flows during a reaction at constant pressure S2C06 Jeopardy Review

25. Hess’s Law 200 A: What is +68 kJ ? S2C06 Jeopardy Review Calculate  H for the following reaction: N 2 + 2O 2  2NO 2 Given: Reaction  H o N 2 + O 2  2NO180 kJ 2NO + O 2  2NO 2 -112 kJ

26. Hess’s Law 300 A: What is - 2486 ? S2C06 Jeopardy Review Calculate  H for the following reaction: C 2 H 4 + 6F 2  2CF 4 + 4HF Given: Reaction  H o H 2 + F 2  2HF-537 kJ 2C + 2H 2  C 2 H 4 52 kJ CF 4  C + 2 F 2 680 kJ

27. Hess’s Law 400 A: What is – 792 kJ ? S2C06 Jeopardy Review Calculate  H for the following reaction: 2S + 3O 2  2SO 3 Given: Reaction  H o S + O 2  SO 2 -297 kJ 2SO 3  2 SO 2 +O 2 198 kJ

28. Hess’s Law 500 S2C06 Jeopardy Review A: What is - 890.36 ? Calculate  H for the combustion of methane, CH 4 : CH 4 + 2O 2  CO 2 + 2H 2 O Given: Reaction  H o C + 2H 2  CH 4 -74.80 kJ C + O 2  CO 2 -393.50 kJ H 2 + ½ O 2  H 2 O-285.83 kJ