OCR A 5.2.1 Lattice Enthalpy REVISION

Complete revision for OCR A A Level Chemistry. To buy PowerPoint used in this video please visit my tes shop - www.tes.com/teaching-resource...

Пікірлер: 35

  • @goharkhan2627
    @goharkhan26274 жыл бұрын

    Allery chemistry was the reason i got my A grade in chem back in 2016. Ty so much!

  • @AlleryChemistry

    @AlleryChemistry

    4 жыл бұрын

    You're very welcome!

  • @amaankhan5857
    @amaankhan58572 жыл бұрын

    imma give u the glug glug 3000 after my A levels

  • @shazilmalik917

    @shazilmalik917

    2 жыл бұрын

    Me first

  • @PetrolDemon
    @PetrolDemon3 ай бұрын

    not sure it was mentioned in the video but useful to note - enthalpy change of dissociation is the opposite of lattice enthalpy!

  • @rkaur6166
    @rkaur61662 жыл бұрын

    Making the notes from Chemguide come alive, great for students 👌

  • @rkanandan
    @rkanandan3 жыл бұрын

    Beautiful explanations this has been saving my A level chemistry thank you so much for this

  • @Annnabannanna
    @AnnnabannannaАй бұрын

    Thank you so much for this channel. The night before chem paper 1, and this is the FIRST time I've ever fully understood this and am able to label and get these type of questions right. I've never gotten this, my teacher just moved on so fast and assumed we all understood. Big thank you for going through the nitty gritty, and the whole concept. You've literally carried my alevels. Acids was another topic I absolutely sucked at.

  • @AlleryChemistry

    @AlleryChemistry

    Ай бұрын

    Ah thanks for that. Hope your exam went well today.

  • @purplesorcerer2172
    @purplesorcerer21723 жыл бұрын

    thank you so much for everything you do its incredibly concise and helpful

  • @jds5142
    @jds51423 жыл бұрын

    Would we need to be able to construct a Born-Haber cycle from scratch (provided they didn't give us one in the question) with the arrows pointing the correct direction (due to the exothermic or endothermic nature of the enthalpy change they represent) and the higher energy arrows positioned above the lower energy arrows? I've checked the specification and I can't seem to find anything

  • @monisamujawar2232
    @monisamujawar22323 жыл бұрын

    36:53 if the calculations, the value of lattice enthalpy of dissociation is negative (given or calculated), do we reverse the signs or keep it as it is??? PS. Thanks for your video. They are really helpful

  • @beagematgcsechem3505
    @beagematgcsechem35053 жыл бұрын

    The Born-Haber cycle for MgO is wrong at 28:17. Thanks for the otherwise amazing video though! :)

  • @neithonosmani9783

    @neithonosmani9783

    2 жыл бұрын

    Why is it wrong?

  • @Sarah-lk8fe

    @Sarah-lk8fe

    2 жыл бұрын

    Yeah I agree as well, the Born-haber cycle for MgO is wrong. Everything else is perfect though 😁 thank you.

  • @DhruvShetty05

    @DhruvShetty05

    Жыл бұрын

    @@neithonosmani9783 there is an LiCl at the bottom

  • @aaminahsarfaraz4304
    @aaminahsarfaraz4304 Жыл бұрын

    This was so useful! Thanks :)

  • @AlleryChemistry

    @AlleryChemistry

    Жыл бұрын

    Glad it was helpful!

  • @ImMata
    @ImMata2 жыл бұрын

    Lettuce enthalpy

  • @naomiosinloye6349
    @naomiosinloye63494 жыл бұрын

    This is so helpful thank you!

  • @AlleryChemistry

    @AlleryChemistry

    4 жыл бұрын

    Glad it was helpful!

  • @deuterium4.028
    @deuterium4.0289 ай бұрын

    hello, doesn't the increasing/decreasing number of protons also affect the lattice enthalpy(as well as ionic charge and ionic radius)?

  • @i.a590

    @i.a590

    Ай бұрын

    idk about the number of protons but if you do ocr a then all you need to explain is the affect of ionic charge and ionic radius xx

  • @sachinbhandari3506
    @sachinbhandari35063 жыл бұрын

    You have helped me greatly thank you

  • @AlleryChemistry

    @AlleryChemistry

    3 жыл бұрын

    No problem!

  • @lilytaylor9720
    @lilytaylor97202 жыл бұрын

    why do you atomise chlorine before lithium? does the order of which you do it matter?

  • @rubiksworld2170

    @rubiksworld2170

    5 ай бұрын

    You’ve probably already done your exams lol, but for anyone else seeing this the order doesn’t matter - I asked my teacher!

  • @Leeyanna-ck1yc

    @Leeyanna-ck1yc

    Ай бұрын

    @@rubiksworld2170thanks !

  • @TheStuntman82
    @TheStuntman823 жыл бұрын

    A1 would be better, A19 has toll charge

  • @tapkoang
    @tapkoang3 жыл бұрын

    Great video 👍 thanks Sir 👌

  • @AlleryChemistry

    @AlleryChemistry

    3 жыл бұрын

    Welcome 👍

  • @em8136
    @em81363 жыл бұрын

    What do you mean by adding all the numbers to equal zero?

  • @user-zo7oq6ts5y

    @user-zo7oq6ts5y

    3 жыл бұрын

    you start anywhere on the cycle and add all the values, keeping the sign the same if you're going with the arrow or changing the sign if going against the arrow. If all the values add up to 0, including the lattice enthalpy worked out, you most likely got the right answer :)

  • @khan99ish
    @khan99ish7 ай бұрын

    at 20:12 I'm a bit confused as to why the value is halved Because 1/2Cl2 turns into Cl which for both is just one Chlorine atom

  • @rubiksworld2170

    @rubiksworld2170

    5 ай бұрын

    The table shows the enthalpy of atomisation of Cl2 not just Cl. So halving would give you the correct value!