Chapter 9 HO

Thatinvolvetheparalorcompletetransferofoneormoreelectr

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Unformatted text preview: s(involve(the(transfer(of(electrons! Reloca8on!of!electrons!releases!energy!stored!in!organic!molecules! *! When you take glucose and you MOVE THOSE ELECTRONS AROUND, that's where the energy comes from - this energy is used to make ATP Redox(Reac0on:((Oxida0on(and(Reduc0ons( Reac8ons!that!involve!the!par%al!or!complete!transfer!of!one!or!more!electrons!from!one! reactant!to!another!! ! Become!Oxidized! Loses!an!electron! Become!Oxidized! Loses!electron! (MOVING ELECTRONS.) So Na is OXIDIZED (loses e-) Cl is REDUCED T& (gains) Na&&&&&&&&&+&&&&&Cl&&&&&&&&&&&&&&&&&&&&&&&&Na+&&&&&&&&&+&&&&&&&&&Cl Become!Reduced! Gains!an!electron! (reduces!its!+!charge)! XeH(&&&&&&+&&&&Y&&&&&&&&&&&&&&&&&&&&&&&&X&&&&&&&+&&&&&&YeH&& Become!Reduced! Gains!an!electron! (reduces!its!+!charge)! Electron(Donor(( Electron(Acceptor( =( =(( Reducing AGENT. Oxidizing AGENT. ( Is(this(the(complete(or(par0al(transfer(of(an(electron?( Complete! Ionic transfer… Some(reac0ons(do(not(involve(a(complete(transfer(of(electrons(but(rather(a(change(in(the( degree(of(electron(sharing(in(covalent(bonds( Oxygens are more EN here, so O gains e- and Carbon loses them Electrons!are!shared!equally! between!H!and!C;!O!and!O! O!Is!more!electronega8ve!than!C!or!H! Electrons!are!not!shared!equally! between!O!and!C;!H!and!O! Which(molecule(is(the(reducing(agent?( ( Which(molecule(is(the(oxidizing(agent?( METHANE CH3 - Donates or loses shared electrons OXYGEN - accepts or gains shared electrons The(more(electronega0ve(an(atom,(the(more(energy(is(require(to(take(an(electron(away(from(it( Carbon is not as electronegative so it easily gives up its electrons. Free&&Energy& Electrons!are!shared! equally!between!atoms! Methane& O2& Electrons!are! pulled!toward! oxygen! CO2& Water& Electrons!lose!poten%al! energy!when!they!end!up! being!shared!unequally! ΔG&<&0& Progress&of&the&reacGon& Combus0on:((is!the!oxida8on!of!methane!(occurs!at!the!burner!of!a!gas!stove)! *! Moves electrons closer to oxygen - rel...
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This document was uploaded on 02/04/2014.

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