OCR Chemistry A Exam Thread (Breadth - May 27 2016 and Depth - June 10 2016)

Anyone get 29. Something for the enthalpy change of reaction? I think it might be 58 ,

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Reply 246

A Sajid

2

That was the hardest test Ive ever done. How are people saying they liked it? wtf?

Reply 247

connorhill

Original post by A Sajid

If Kc constant comes up im just going to walk out the exam I swear. :colonhash:

hahahahahahaha lol at your life

Reply 248

Original post by A Sajid

That was the hardest test Ive ever done. How are people saying they liked it? wtf?

It was easy, in chemistry they just serveeverything on a plate, the question are work the number of electrons, protons, neutrons in this ? Etc.. What type of reaction is this, how many volumes of gas produced, use the 2 formulas, so easy, anyone can do it

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Reply 249

I got -58.5 kJ mol-1 I think

Reply 250

ukgjyhtrhv

1

Was everyone else doing the same test as me then? 😂 i thought it was easy

Reply 251

Original post by Fish40

It was easy, in chemistry they just serveeverything on a plate, the question are work the number of electrons, protons, neutrons in this ? Etc.. What type of reaction is this, how many volumes of gas produced, use the 2 formulas, so easy, anyone can do it

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If anyone could do it, it would be a mickey mouse a-level..?

Reply 252

A Sajid

2

Original post by connorhill

hahahahahahaha lol at your life

Ive had enough of this sh. Im just gonna trap. Allow A levels. I aint made for this.

Reply 253

Original post by Jitesh

I got -58.5 kJ mol-1 I think

I'm an idiot, didn't write a minus, so you divided your q by 0.075 mol and not 0.150mol, why?

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Reply 254

Original post by Fish40

Anyone get 29. Something for the enthalpy change of reaction? I think it might be 58 ,

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100cm3 I think you had to use (100g)

Reply 255

Nettled

Original post by Jitesh

I got -58.5 kJ mol-1 I think

How were you meant to work out that qs? I've only ever dkne parctise questions were i worked out the moles for water.

Reply 256

Original post by Jitesh

100cm3 I think you had to use (100g)

Yes I had that, but divided my q=4.736 KJ or something by 0.150

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Reply 257