THE LAW OF CONSERVATION        OF ENERGYEnergy can not be created or destroyed
System and Environment    System    System is the substance, the reaction, a process    that became the center of attentio...
Lets check it outExample:substance A and substance B isinserted into the test tubeSystem: substance A andsubstance BEnviro...
Types of system1. Open System   If the system and the environment can   experience, exchange of matter and energy2. Closed...
The sign for the heat and work• System received heat              q (+)• System released heat               q (-)• System ...
Internal Energy (E)the amount of energy possessed      by an agent or system       ΔE = EP - ER
Reaction of Heat1.   If reaction is reacting in closed     system, with fixed volume     (ΔV=0), where if ΔV=0 there is   ...
2.   If reaction is reacting in opened     system, with fixed pressure     , where may system do or     received work     ...
Exothermic Reaction• Chemical reactions that are  accompanied by the release of heat• Release heat from system to  surroun...
Exothermic Reaction          Reactants  Products + Energy                                 Energy of reactants            ...
Endothermic Reaction•    Chemical   reactions that   are    accompanied by the absorption of    heat• Absorb heat from sur...
Endothermic Reaction            Energy + Reactants  ProductsEnergy                          Activation     Products      ...
Thank you for your attention There is a price for you in next slide           Attention pleaseeeeeee!!
THERMOCHEMISTRY                   1         Influenced by                              involving45                        ...
Statement to find the key-word :1. Energy cannot be destroyed or created2. the part of the universe on which we focus our ...
THERMOCHEMISTRY                    Law of Conservation of                                                                 ...
Thermo part 1
Thermo part 1
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Thermo part 1

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Thermo part 1

  1. 1. THE LAW OF CONSERVATION OF ENERGYEnergy can not be created or destroyed
  2. 2. System and Environment System System is the substance, the reaction, a process that became the center of attention (object) Environment The environment is everything that is related to the system
  3. 3. Lets check it outExample:substance A and substance B isinserted into the test tubeSystem: substance A andsubstance BEnvironment: test tubes and air
  4. 4. Types of system1. Open System If the system and the environment can experience, exchange of matter and energy2. Closed System If the system and the environment can not be exchanged material, but it can be an exchange of energy3. Isolated System In system and the environment can not be an exchange of energy and matter
  5. 5. The sign for the heat and work• System received heat q (+)• System released heat q (-)• System does work w (-)• System received the work w (+)
  6. 6. Internal Energy (E)the amount of energy possessed by an agent or system ΔE = EP - ER
  7. 7. Reaction of Heat1. If reaction is reacting in closed system, with fixed volume (ΔV=0), where if ΔV=0 there is no work in there(w=0) So ΔE= q
  8. 8. 2. If reaction is reacting in opened system, with fixed pressure , where may system do or received work So ΔE= q + w
  9. 9. Exothermic Reaction• Chemical reactions that are accompanied by the release of heat• Release heat from system to surrounding• H product < H reaction• Sign of ΔH is always (-)
  10. 10. Exothermic Reaction Reactants  Products + Energy Energy of reactants Energy of productsEnergy Reactants - H Products Reaction Progress
  11. 11. Endothermic Reaction• Chemical reactions that are accompanied by the absorption of heat• Absorb heat from surrounding to system• H product > H reaction• Sign of ΔH is always (+)
  12. 12. Endothermic Reaction Energy + Reactants  ProductsEnergy Activation Products Energy Reactants + H Endothermic Reaction progress
  13. 13. Thank you for your attention There is a price for you in next slide  Attention pleaseeeeeee!!
  14. 14. THERMOCHEMISTRY 1 Influenced by involving45 7 8 2 36 causing 9 10 12 11
  15. 15. Statement to find the key-word :1. Energy cannot be destroyed or created2. the part of the universe on which we focus our attention in a certain experiment3. the parts of the universe that interact instantly with the system or anything that restricts the system4. may heat exchange between system and surrounding and matter movement5. may heat exchange between system and surrounding and not matter movement6. impossible for heat exchange between system and surrounding7. subtracting the enthalpy of the reactant from the enthalpy of product8. energy contained in a substance at temperature of 25oC and pressure of 1 atm.9. a chemical reaction in which heat is absorbed from the surroundings10.a chemical reaction in which heat is released from the system11.Symbolize for enthalpy of the system falls.12.Symbolize for enthalpy of the system rises.
  16. 16. THERMOCHEMISTRY Law of Conservation of Energy Influenced by involvingOPENED ENTHALPY ENTHALPYCLOSED SYSTEM SURROUNDINGS CHANGEISOLATED causing ENDOTHERMIC EXOTHERMIC REACTION REACTION

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