i am so glad there's videos like this on the internet XD

the reaction is exothermic therefore the overall enthalpy change is negative -41.02. H1 should be -36.95 as it is an exothermic reaction as the temperature rose by 9. H2 is an endothermic reaction therefore should be +4.02.

@pardhivkondreddy6848

2 жыл бұрын

Yes, I had the same doubt. Q = mcΔT however Q here is energy. Not ENTHALPY CHANGE. The equation for enthalpy change must be: ΔH=-mcΔT Hence ΔH3 in the experiment conducted would be -41.0 J per mole and not 41 J per mole. Correct me if I am wrong.

@davankk2857

2 жыл бұрын

@@pardhivkondreddy6848 wouldn't the equation for enthalpy change be (delta)H = -mc(delta)T/n ?

@maxmarshall484

2 жыл бұрын

@@davankk2857 yes, if temp increases q=negative, if temp decreases q=positive, hence q is in J convert to KJ then Kj/Mol = enthalpy change

@rhysstevomusic1338

2 жыл бұрын

It's because it's supposed to be -q/n

@rhysstevomusic1338

2 жыл бұрын

Also delta H1 has been added up wrong, should be -37.62. Also, Delta H2 should be 4.01.

Many thanks Tabitha you're magic!

This is fantastic!

Love this. Thanks xx

I’m doing this practical next week, thank you for this video :-)

@Xxxkska

8 ай бұрын

What grade did you get

@shourya9649

4 ай бұрын

wat grade did u get for ur final exam

Can you please make videos on the other practicals as well as the a level ones

Great vid ! 👍🏾

why are the arrows pointing down, i thought that was only used for combustion values?

Thanks!

im just confused why the arrows point downwards?

helped for my gcse next week

day before paper one

mass of what? for the equation

THANK YOUUU

Thank you

Hi, thank you for this video, it was really helpful. Can you please explain why after finding the temp change in Celsius you didn’t add 273 to convert it into kelvin? Because you changed the sign from c to k but the numbers remained the same.

@bloothechronosapien4288

Жыл бұрын

Change in temperature is used in the equation so the difference in kelvin is same as difference in Celsius. Say temp changed from 20 to 25 C, 25 - 20 is same as (25+273) - (20+273)

thank you

The units for Q are J not Jmol-1

i am curious as to how the anhydrous copper(ii)sulphate did not react with moisture in air to form hydrous copper(ii)sulphate?

@OmniversalInsect

8 ай бұрын

I think it did a little bit because the colour is very slightly blue

I didn't understand the calculations How did you get the 159.61 in 4.06/159.61?

@llii338

3 жыл бұрын

This is the molar mass for cuso4 and she divided the mass by the molar mass so she gets moles

@elettrabelaqua4575

3 жыл бұрын

@@llii338 thank you

Dear ma'am are these results accurate??

@10000subswithnovideos.

4 жыл бұрын

No.

@skerpy8145

5 ай бұрын

everyone gets different results my friend. You are probably in university now so this probably will not help but just saying.

Is this applicable for CIE AS Level examinations?

@samanthawong8105

3 жыл бұрын

check the specification on their website

why do we have to use 24cm^3 of water for the hydrated copper (II) sulfate but 25cm^3 of water for the anhydrous copper (II) sulfate?

@theunknownchampion9492

2 күн бұрын

because the hydrated copper already contains some water in it so to balance it out we use less of it. This may be a bit late lol

This is really proof that not knowing something in this age is out of ignorance because there's so many resources on the internet that tach almost anything

@barksstuff8141

3 жыл бұрын

shut the fuck up

@Cornyyylieus

2 жыл бұрын

yet still u cant spell 🤡🤡

You forgot to minus the q. Everything else is helpful!

why didnt you convert the temp to kelvin?

@zahrahussain4511

Жыл бұрын

you don't have to it is exactly the same my chem teacher said

@727Joshy

Жыл бұрын

5:28

didn't understand a word. :) thanks anyways

Ty 4 this girl I'm meant to write a method for this and it's due in 1 hour 😻😻😻