Week-9-Energy-changes-in-Chemical-Reactions.pptx

Week-9-Energy-changes-in-Chemical-Reactions

1. WEEK 9: ENERGY CHANGES IN CHEMICAL REACTIONS

2. Just Jumble! Start!

3. Tell the Answer, Hurry Up! 1. TEHROMTRYISMCHE

4. THERMOCHEMISTRY is the study of energy changes that occur during chemical reactions.

5. Tell the Answer, Hurry Up! 2. YNREGE

6. ENERGY is the ability to do work or transfer heat.

7. Tell the Answer, Hurry Up! 3. THEA

8. HEAT is a form of energy transfer between two objects as a result of their difference in temperature.

9. Tell the Answer, Hurry Up! 4. STEMSY

10. SYSTEM a component or set of components of interest

11. Tell the Answer, Hurry Up! 5. SOUNDRURINGS

12. SURROUNDINGS e verything that a system can exchange energy with, everything touching / connected to it

13. Tell the Answer, Hurry Up! 6. ETHOXERCIM

14. EXOTHERMIC REACTIONS a re reactions or physical changes in which the system loses heat.

15. Tell the Answer, Hurry Up! 7. EDNOHTERCIM

16. ENDOTHERMIC REACTIONS a re reactions or physical changes in which the system absorbs heat.

17. Tell the Answer, Hurry Up! 8. ENHTLAYP

18. ENTHALPY is the heat content of a system.

19. Tell the Answer, Hurry Up! 9. TERMOHDAYNICSM

20. THERMODYNAMICS is the study of energy and its transformations.

21. ENERGY CHANGES IN CHEMICAL REACTIONS Chemical processes release or absorb energy.

22. THERMODYNAMICS THERMOCHEMISTRY

23. Energy & Heat

24. Energy and Heat

25. Energy and Heat

26. THERMOCHEMISTRY Focus is on the heat and matter transfer between the system and the surroundings

27. THREE TYPES OF SYSTEMS

28. THREE TYPES OF SYSTEMS

29. HEAT AND HEAT FLOW Heat flows from higher- temperature object to lower-temperature object. EX OTHERMIC REACTION EN DOTHERMIC REACTION energy EN ters energy EX its

30. The enthalpy change of the reaction, ∆H has a negative value EXOTHERMIC REACTION ENDOTHERMIC REACTION The enthalpy change of the reaction, ∆H has a positive value Δ H= (Δ H products  - Δ H reactants )

31. EXOTHERMIC REACTION ENDOTHERMIC REACTION are chemical reactions that release heat to the surrounding. Energy is released from the system. Temperature increases with progression of the reaction. Enthalpy of reactants is higher than that of the products. Change in enthalpy ( ∆ H) is a negative value. are chemical reactions that absorb heat to the surrounding. Energy should be given to the system. Temperature decreases with progression of the reaction. Enthalpy of reactants is lower than that of the products. Change in enthalpy ( ∆ H) is a positive value.

32. Thank you!