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Entholpy Changes in Runs W ENERGY (J) —> Abilily do clo wonk on Couse O Change > Energy can be dIransferved through: l. Conduction: transfer of energy by diuck contact a. lonvection: transfer of energy by the mevernunt of fuicls 3. Raokation: transfer of energy by Unetremagrshic wavia. Law of Conservation of energy > Energy connot be created ar odsstroyed un & closed syskm it can oly be transterred frem one form 0 ano ther. # (CHEMICAL RAN > Achumiol Rin id o& pro nw substances in whith suatt > Initial subsfante wed in Oe chemical Rxw are colle reactants . —> New substance formed 5 a Aull Of He chemecal Run arw calad products. > In Gumicol Runs enngy as transferred betwen sysiem cess thot susull inthe formation % anit ww tenver ted Lvto Producls and surroundings. Gndoltanmace Exothermic Ruw in which ergy Ran in which energy is frans{ered tow is transterred +o the surroundarg § the Surveundings Surreunuling —> syste System —> Surroundiag y temp ) ww Vv ewer 4 Yeonp HK Heol & Temporal une —> Temperature: Measure of the avg KE of parficles in & System. > Heat: Energy that ia fransferred between objects of idfercent temps. Ho * cL, — ancl iv” ZEW a ae + usu — au-cle Bend energy ~7 Break or mnie v ivew Ayur giver given, wit im 3 & iver Pegi ~~ \ se ¢xo Oe im E ndethnmuc PE Reach Endoturmic AH= te Exomermic AH= “VY mos (1a-4) aw AH = H,-H, Bem BT 7 Be ASM Cugy Vike , uapau M tnurgy required to roise in temp % |K9 mass of a substance Cc). Q= wLldAt | cc 8 CeKrkg hk” m At : = kT Talk kg K A= KT/ mol nw Q Q= mc AT 7 “ ~ (0-0as)(h-1@ DRG TK!) (3-88 ) ‘ an = 0-34q4bI ne LAS a x Wow) = oo3t af 42-3979 k AH= & = 0.348 = LALKS ] ol nw po. o1tl~™ hw nw la. @=mcT = (0-wny( 4.13) L2>-6- 21-3) = 0-0Uu2 4 b. Au=-Q = -0-042kJ .-0-035 Kig” w ez 2. Q=mcat = (0-0288k9) (4-18 LBA) 84g x tmol |g. 02 { mol = 4. 64K 65-32 Ans -@ . 4-64 2 923-BkI fmol n 0-02 Energy ea cles, L Bend leven heng Bend Send former) enthalpy ~~ DAA ently sumnation Og, The bond enthalpy (BE) io dined mw Hu energy mumwind 40 break one molu of rondd Wy Womglyhe Kicsiow in One mole wy garcows tev alent’ mo lets uaty standard cndilons- Bencl wreaking —> endo —> AH +vV& Bonol making —> exo —>» ANH =-VE anenenaserr’”™Y” : bonels \ _ leon [ar = (te proven) = Cee oF teense) Reactenk produc’ &a- Ww. A; " " Cce & HBr —>R7E-O Br Su ar H “Yt - -®r [°" Ce=e) + BECK | _ [5 (GH) + cc-ep a(C-80)] + & (c-4) =- 65k wot CH, + Wo — nu, + Co Lal 1 -c-u Oo. n-W c-0 any J ‘A 3 H . =o] = \AtkS [4 (e#) 4 2(w-0)] -[ 3 (H-A) « Cz | / a. CHa t (Wl, —> CHch + wee ( in woo H C-U wooo & H=ch 4 “ [ al-a) + (U- )] -[3ten9 +(t-C)+ | 4-1) [4 (44) + 242 | - ( 3 (414) + 32444317 1998 - 1994 = -44 kT mot"! Exothermic hunct, Produtls ane mow stable Freray Clyde muthed ry yr nner” 0) C+ 2H, + L0,—> Chon +0,\-344 \+0, ye 240% * - (0, + 24,0 AW -426 - 286%2) — -394)=0 AH: -240 kJ mor! Ds cng OH) @ 3H, (4) * aces) +40, —> O,uHs +1364 2, 4) ray UL) —> GHg OWL) + 30, 2.Cls)+ 20,9) > 2Yhly) 7% 344 BN, ly) + Zoro (Ly) 3x28 2Lls) + 3H, (5) + t O14)? GUsOH (L) ANE = 1o6t +2 (-394) + 3-284) = -at” KI mol” @ ANH, ly) + 50, (9)—> 4noly) + 64,00) \ne J bbx2 J ~$72%3 2(Nat 3H.) 2(Nat0,)+3 (24,402) ayda + 6A, + v7, ~ ankt 76, » 6+ 36, AWS = (92x2) + (66x2) + 3 (-532) = ~1M0D kImol”' Standord enthulpy homge of lmbwuition AH? we dhe Ae ip the enthalpy change that occurs When one mole of a Substance in its Stendovd shaky 's burned comp Akeley Ze om Gem. * Sandond entiatey chovge ot _dermetion AM Energy change thal oremns when ene mole +o substance formed from ids const tunk dunt in dew stindard stile. 49:- CoH, + 80, — s(o, + 6H,0 buy: <3 0 -344 286 AW = & AMt(pdts) - SAH (Reacto) s [s(-aa4rec-286))] - (-143) = - 3513 K3/mol b) Q = ALovokj AH=-& Ww 2200 = ~ +6000 —<_— w N= 3456 mols (He 34 -shmols Gus Wily - tsah hha \mol 
