[NilFBosh]

(Original post by squeakypop)
Ethene and steam are passed over a phosphoric acid catalyst to produce ethanol. This process is known as hydration. It takes place at a temperature of 300 degrees and a pressure of 60-70 atmospheres. Only some of the ethene reacts, the rest is recycled through the process.

The Haber process is the production of ammonia by the reaction of hydrogen from natural gas and nitrogen from the air. It takes place at a temperature of 450 degrees and pressure of 200 atmospheres, using an iron catalyst. Unreacted nitrogen and hydrogen are recycled through the process. The forward reaction (the process is reversible) is exothermic.

The chlor-alkali process is the electrolysis of sodium chloride solution using a titanium anode and a steel cathode. The products are chlorine at the anode, hydrogen at the cathode, and a remaining solution of sodium hydroxide. The process takes place in a diaphragm cell to keep the products separate and prevent them from reacting with each other.

The contact process is the production or sulphuric acid.
Sulphur reacts with oxygen to produce sulphur dioxide.
This reacts with more oxygen to produce sulphure trioxide. This is a reversible reaction which happens at 450 degrees, normal pressure, and with a vanadium oxide catalyst. The forward reaction is exothermic.
The sulphur dioxide is absorbed it concentrated sulphuric acid to produce oleum (or fuming sulphuric acid). This is added to water to give sulphuric acid.

Hope this helps! Good luck everyone
.

mate...for our spec...u have to spell sulphur as "SULFUR" be careful!

[Big-Daddy]

(Original post by NilFBosh)
mate...for our spec...u have to spell sulphur as "SULFUR" be careful!

No we don't. Sulphur is perfectly acceptable.

(And no, this is not exam discussion. I'm not making a comment about the exam we just had.)

[member963009]

They accept either spelling.

[g_l]

Can we discuss it now?

[Rss777]

(Original post by g_l)
Can we discuss it now?

i guess so , so how did you find it?

[Mazzini]

Yes, we are allowed to discuss it now.

I didn't think it was too hard. Thankfully the stuff I'd just revised came up!

If you increase pressure in an equilibrium reaction it goes to the right, doesn't it?

[gdcf]

(Original post by Mazzini)
Yes, we are allowed to discuss it now.

I didn't think it was too hard. Thankfully the stuff I'd just revised came up!

If you increase pressure in an equilibrium reaction it goes to the right, doesn't it?

Yes, it goes to the right

[Rss777]

was the molar enthalpy 48?

[g_l]

(Original post by Rss777)
i guess so , so how did you find it?

I found it ok, i think it saved my first paper...
How bout you?

(Original post by Rss777)
was the molar enthalpy 48?

Well I think i got 33.88 for that........
Can't remember though

[Asad14]

What were to main compounds present in
Pyrite and Limestone?

[Asad14]

(Original post by g_l)

Well I think i got 33.88 for that........
Can't remember though

Same i got 33.89 and rounded it off to 33.9 KJ/mol

[Rss777]

it wasnt too bad , the numericals were a bit tricky but other than it was fine.

[*Mariya*]

(Original post by gdcf)
Yes, it goes to the right

what was the explanation?

[HerroKitty]

(Original post by Rss777)
was the molar enthalpy 48?

I got that as well

Then again, I wasn't really sure how to go about doing it and just tried to make some sort of calculation that made sense.

What did everyone put for the electrolysis equations of Aluminium and Oxygen?

[*Mariya*]

(Original post by Rss777)
was the molar enthalpy 48?

i got 48 too

[Rss777]

(Original post by HerroKitty)
I got that as well

Then again, I wasn't really sure how to go about doing it and just tried to make some sort of calculation that made sense.

What did everyone put for the electrolysis equations of Aluminium and Oxygen?

Aluminum : al3+ + 3e- --> Al
Oxygen: 2o2- ---> o2 + 4e-

[Graceyfave]

(Original post by HerroKitty)
I got that as well

Then again, I wasn't really sure how to go about doing it and just tried to make some sort of calculation that made sense.

What did everyone put for the electrolysis equations of Aluminium and Oxygen?

It was q/n which is energy over moles. You would have calculated the moles beforehand. The energy in kj was the energy 1800/1000. I got -48kj. Because it was exothermic.


This was posted from The Student Room's iPhone/iPad App

[Asad14]

(Original post by HerroKitty)

What did everyone put for the electrolysis equations of Aluminium and Oxygen?

I dont remember exactly, but i got 12 electrons both the equations

[Mazzini]

(Original post by gdcf)
Yes, it goes to the right

Okay thanks

I put it goes to the right because there is more pressure so there is less space for the particles to move around in and they are going faster so there is a greater chance of them colliding (so, reacting too, collision theory) so more product will be made so it goes to the right.

[Asad14]

(Original post by Graceyfave)
It was q/n which is energy over moles. You would have calculated the moles beforehand. The energy in kj was the energy 1800/1000. I got -48kj. Because it was exothermic.


This was posted from The Student Room's iPhone/iPad App

How did you get energy as 1800?, my value for energy was 1702 and i got a decimal value for the answer so im probably wrong