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Honors Chem Ch 16 Pg 501

Honors Chem Ch 16 Pg 501. Temperature – avg kinetic energy Heat – total energy, doesn’t have to be hot, based on mass Pg 502 Specific heat – heat needed to raise temp of 1 g by 1 C, see chart Pg 503, notice units! C + 273 = K Q = mc∆t Practice Pg 504 #1,2

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Honors Chem Ch 16 Pg 501

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  1. Honors Chem Ch 16 Pg 501 • Temperature – avg kinetic energy • Heat – total energy, doesn’t have to be hot, based on mass Pg 502 • Specific heat – heat needed to raise temp of 1 g by 1 C, see chart Pg 503, notice units! • C + 273 = K • Q = mc∆t • Practice Pg 504 #1,2 • Turn in Pg 514 Sect Rev #5 and Pg 523 #7-10

  2. Exothermic – energy released, solution gets warmer, shown as + on product side Pg 505 - products have less energy after energy released, graph Pg 506, ∆H = negative • Endothermic – energy absorbed by reaction, solution gets colder, shown as + on reactant side Pg 506 - products have more energy after energy absorbed, graph Pg 507, ∆H = positive

  3. Heat of Reaction • Enthalpy = heat • Table Pg R66, products – reactants, multiply by coeff, notice units/info at bottom of pg • Pg 512 Practice #1, Pg 514 Pract #1,2, Pg 523 #13, write bal eq w/ heat on correct side and indicate if endo or exo • Pg 523 # 11,12, 14, 15, 16, 32, 34, 35, Pg521 #2 (the ∆H listed is for the product next to it), Pg527 #2,3

  4. Entropy Pg517 • Amt of disorder • Increase in entropy – dissolving a solid, chging solid to liq or liq to gas pg 518

  5. Ch 17 Activation Energy Pg532 • Energy added to reaction • graph Pg532 for exo and 534 for endo • Ea = activation energy, from react to highest pt • ∆E = diff between reactants & products • Ea’ = diff between prod & activation energy • Practice Pg535 and Pg551 #7

  6. Factors that Affect Reaction RatePg536 • Reactivity of elements • Surface area – remember yellow cubes/handout! • Temp • Concentration • Catalysts – substance that speeds up reaction without being changed itself, reaction needs less activation energy, graph Pg539, story Pg547 • Pg550 #6, Pg551 #13,15,19, Pg553 #3,5,11

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