April 12, 2021, 10:32:03 PM
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### Topic: The Haber-Bosch Process and Le Chatlier's Principle  (Read 218 times)

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#### chlochlo

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##### The Haber-Bosch Process and Le Chatlier's Principle
« on: April 06, 2021, 05:25:37 AM »
Hello! The question I'm struggling with is...

Explain Chatelier equilibrium and the effects of temperature and pressure on the yield of ammonia from hydrogen and nitrogen in the Haber-Bosch process. You must include actual figures and show how the values are calculated.

I haven't been given any values and I have explained the effects, I am just stuck on the last sentence of including actual values and showing how they are calculated. Can someone help me, please?

#### chenbeier

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##### Re: The Haber-Bosch Process and Le Chatlier's Principle
« Reply #1 on: April 06, 2021, 06:27:06 AM »
You should give an example. Decribe the reaction equation. Calculate K for it and the change if pressure or temperature is changed. Check is the process exo- or endotherm.

#### chlochlo

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##### Re: The Haber-Bosch Process and Le Chatlier's Principle
« Reply #2 on: April 06, 2021, 07:30:02 AM »
You should give an example. Decribe the reaction equation. Calculate K for it and the change if pressure or temperature is changed. Check is the process exo- or endotherm.

Thank you for your reply! I know that the forward process is exothermic as the given enthalpy change is -91 kJ mol.

Can you please expand more on what you said? What is the equation of k, how can I calculate it?
How can I substitute different temperatures and pressures?

I'm sorry, I promise I'm not trying to just get the answers, I've been researching it for a long time and I still have no clue on how to go on about this.

#### chenbeier

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##### Re: The Haber-Bosch Process and Le Chatlier's Principle
« Reply #3 on: April 06, 2021, 07:37:25 AM »
What is the chemical equation.
Convert this to mass of law action, guides to k, could be kc for concentration or if pressure is used kp.
Consider van't Hoff and Clausius Claperon equation.
« Last Edit: April 06, 2021, 07:51:12 AM by chenbeier »

#### chlochlo

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##### Re: The Haber-Bosch Process and Le Chatlier's Principle
« Reply #4 on: April 06, 2021, 07:45:07 AM »
What is the chemical equation.
Convert this to mass of law action, guides to k, could be kc for concentration or if pressure is used kp.
Consider van't Hoff and Claudius Claperon equation.

Thank you! the chemical equation is "N2 + 3H2 ⇌ 2NH3         ∆H = - 92 kJ / mol"
Unfortunately we've never studied van't Hoff and Claudius Claperon equation.
I haven't been given concentration so that I could convert to mass of law action. Would this still be a problem? Or do I need to make up my own? All I have been given is the equation and the enthalpy change

#### chenbeier

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##### Re: The Haber-Bosch Process and Le Chatlier's Principle
« Reply #5 on: April 06, 2021, 07:54:33 AM »
« Last Edit: April 06, 2021, 08:07:26 AM by chenbeier »