Chemistry 1150 chapter 6

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zzto
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135973
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Chemistry 1150 chapter 6
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2012-02-17 22:54:38
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Chemistry 1150 chapter
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Chemistry 1150 chapter 6 flashcards of important facts from power point slides.
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  1. Thermodynamics is the study of
    • heat and its
    • transformations
  2. Thermochemistry is a branch of thermodynamics that deals with
    • the heat involved with chemical and
    • physical changes.
  3. When energy is transferred from one object to another, it appears as
    work (w) and/or as heat (q).
  4. 1 J (Joule)
    = 1 kg*m2/s2
  5. 1 calorie (cal)=J
    4.184J
  6. 1 Calorie (Cal)= c
    1 kilocalorie
  7. Delta Euniverse
    Delta Esystem + Delta Esurroundings
  8. Delta E
    Efinal - Einitial = Eproducts - Ereactants
  9. ∆E = First Major Equation
    q + w (heat +work)?
  10. PV work
    Pressure -Volume Work
  11. •PV work:
    created because of
    volume change against an external pressure
  12. Work = External Pressure x Change in
    Volume
    w = ─PDV
  13. SOME IMPORTANT TYPES OF ENTHALPY CHANGE
    C4H10(l) + 13/2O2(g) ----------------> 4CO2(g) + 5H2O(g)
    heat of combustion (DHcomb)
  14. SOME IMPORTANT TYPES OF ENTHALPY CHANGE
    NaCl(s)------->NaCl(l)
    heat of fusion (DHfus)
  15. SOME IMPORTANT TYPES OF ENTHALPYCHANGE
    C6H6(l)---------->C6H6(g)
    heat of vaporization (DHvap)
  16. SOME IMPORTANT TYPES OF ENTHALPY CHANGE
    K(s) + 1/2Br2(l)--------> KBr(s)
    heat of formation (DHf)
  17. Second Major Equation
    Heat Equation q = mass x cs x ∆T (Always
    TF – TI!)
    q = mass x cs x ∆T (Always TF – TI!)
  18. AMOUNT (mol) of compound A

    molar ratio from balanced equation
    goes to
    AMOUNT (mol) of compound B
  19. AMOUNT (mol) of compound B goes to

    DHrxn (kJ/mol)
    HEAT (kJ) gained or lost
  20. Third Major Equation
    I don't get what its suppose to be exactly
  21. since DE = q + w, we can determine DE (System) by...
    measuring q and w
  22. What do q and w stand for?
    • q -The heat transferred into/out of the system
    • w-The work done by/on the system.
  23. A state function
    Change in altitude depends only on the difference between the initial and final values, not on the path taken.
  24. Hess's Law
    The change in enthalpy for a stepwise process is the sum of the enthalpy changes of the steps. (Add up the changes for your total answer)
  25. Fourth Major Equation!
    • DH0rxn = S mDH0f(products)- S nDH0f(reactants)
    • ??? Study this outside the cards I don't get it, I think it has something to do with hess's law

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