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Equilibrium (hl)

Le Chatelier Principle and industry The Haber Process The Contact Process. Equilibrium (hl). A volatile liquid Some molecules will evaporate Eventually dynamic equilibrium will be reached between evaporation and condensation Rate of vapourisation = Rate of condensation

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Equilibrium (hl)

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  1. Le ChatelierPrinciple and industry The Haber Process TheContactProcess Equilibrium (hl)

  2. A volatileliquid Somemoleculeswillevaporate Eventuallydynamicequilibriumwill be reachedbetweenevaporation and condensation Rate of vapourisation = Rate of condensation At thispointthepressureexertedisthevapourpressure Liquid-VapourEquilibrium

  3. Liquid-VapourEquilibrium

  4. Moleculesneedenergyto escape thesurface Dependsonstrength of intermolecular forces Endothermicprocess Thisenergyiscalledenthalpy of vapourisation TheEnthalpy of Vapourisation

  5. Theamount of energyrequiredtoconvertone mole of substancefromliquidtogaseousphase Definition

  6. Intermolecular forces and enthalpy of vapourisation

  7. A liquidboilswhenitsvapourpressureisequaltothethepressureonthesurface of theliquid Theboilingpointisthetemperature at whichthevapourpressureisequaltostandardatmosphericpressure Temperatureincreasesvapourpressure….

  8. VapourPressure Vs Temp.

  9. Concentrations, whenputintotheequilibriumexpression, willonlyequaltheequilibriumconstantifthesystemis at equilibrium. Howeverwe can still use ittopredictthewaytheequilibriumwillmove. TheEquilibriumLaw

  10. Thisisthevalueproducedbytreatingtheconcentrationsthesame as theequilibriumconstant. If Q > K thenvalue of Q mustfall (systemshiftstoleft i.e. reverse direction) If Q = K thenequilibriumisestablished If Q < K thenvalue of Q mustrise (systemshiftstoright) ReactionQuotient q

  11. When a mixture initiallycontaining 0.0200 mol/L sulphurdioxide and anequalconcentration of oxygenisallowedtoreachequilibrium in a container of fixedvolume at 100K, itisfoundthat 80.0% of thesulphurdioxideisconvertedtosulphurtrioxide. Calculatethevalue of theequilibriumconstant at thattemperature. Question

  12. Thereadingispages 192 to 195. Thequestionsstarton page 195. Reading and questions

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