A2 chemistry help
Hey guys,
I got a few questions on chemistry that I'm so confused with. Can someone help please!!1- the equation 0.5N2 (g) + 2/3H2 (g) = NH3 (g)
The line is not drawn below a temperature of 240 K because its slope (gradient) changes at this point.Suggest what happens to the ammonia at 240 K that causes the slope of the line to change?
Answer - change of state to a liquid
So in this question I did not understand why at high temperature the gaseous
ammonia becomes liquid!!!
2- Give one reason why methanol, synthesised from carbon dioxide and hydrogen, may not be a carbon-neutral fuel
Answer - CO2 maybe produced during H2 manufacture
3- What can you deduce about the formation of ammonia if the reaction mixture is heated to a temperature above the value that you have calculated in part (e) (ii)?
Answer - The reaction is not spontaneous at higher temperature than 464.
CAN SOMEONE EXPLAIN PLEASE!!
I got a few questions on chemistry that I'm so confused with. Can someone help please!!1- the equation 0.5N2 (g) + 2/3H2 (g) = NH3 (g)
The line is not drawn below a temperature of 240 K because its slope (gradient) changes at this point.Suggest what happens to the ammonia at 240 K that causes the slope of the line to change?
Answer - change of state to a liquid
So in this question I did not understand why at high temperature the gaseous
ammonia becomes liquid!!!
2- Give one reason why methanol, synthesised from carbon dioxide and hydrogen, may not be a carbon-neutral fuel
Answer - CO2 maybe produced during H2 manufacture
3- What can you deduce about the formation of ammonia if the reaction mixture is heated to a temperature above the value that you have calculated in part (e) (ii)?
Answer - The reaction is not spontaneous at higher temperature than 464.
CAN SOMEONE EXPLAIN PLEASE!!
Original post by Hiyam torkamane
Hey guys,
I got a few questions on chemistry that I'm so confused with. Can someone help please!!1- the equation 0.5N2 (g) + 2/3H2 (g) = NH3 (g)
The line is not drawn below a temperature of 240 K because its slope (gradient) changes at this point.Suggest what happens to the ammonia at 240 K that causes the slope of the line to change?
Answer - change of state to a liquid
So in this question I did not understand why at high temperature the gaseous
ammonia becomes liquid!!!
Answer - CO2 maybe produced during H2 manufacture
Answer - The reaction is not spontaneous at higher temperature than 464.
CAN SOMEONE EXPLAIN PLEASE!!
I got a few questions on chemistry that I'm so confused with. Can someone help please!!1- the equation 0.5N2 (g) + 2/3H2 (g) = NH3 (g)
The line is not drawn below a temperature of 240 K because its slope (gradient) changes at this point.Suggest what happens to the ammonia at 240 K that causes the slope of the line to change?
Answer - change of state to a liquid
So in this question I did not understand why at high temperature the gaseous
ammonia becomes liquid!!!
Answer - CO2 maybe produced during H2 manufacture
Answer - The reaction is not spontaneous at higher temperature than 464.
CAN SOMEONE EXPLAIN PLEASE!!
240K is not high temperature, it is -33ºC...
Original post by Hiyam torkamane
Hey guys,
I got a few questions on chemistry that I'm so confused with. Can someone help please!!1- the equation 0.5N2 (g) + 2/3H2 (g) = NH3 (g)
The line is not drawn below a temperature of 240 K because its slope (gradient) changes at this point.Suggest what happens to the ammonia at 240 K that causes the slope of the line to change?
Answer - change of state to a liquid
So in this question I did not understand why at high temperature the gaseous
ammonia becomes liquid!!!
Answer - CO2 maybe produced during H2 manufacture
Answer - The reaction is not spontaneous at higher temperature than 464.
CAN SOMEONE EXPLAIN PLEASE!!
I got a few questions on chemistry that I'm so confused with. Can someone help please!!1- the equation 0.5N2 (g) + 2/3H2 (g) = NH3 (g)
The line is not drawn below a temperature of 240 K because its slope (gradient) changes at this point.Suggest what happens to the ammonia at 240 K that causes the slope of the line to change?
Answer - change of state to a liquid
So in this question I did not understand why at high temperature the gaseous
ammonia becomes liquid!!!
Answer - CO2 maybe produced during H2 manufacture
Answer - The reaction is not spontaneous at higher temperature than 464.
CAN SOMEONE EXPLAIN PLEASE!!
1. Charco has pretty much summed up. Decreasing the temperature decreases the energy of molecules, so they come closer together, which form hydrogen bonds and make the liquid.
2. Yes. You can also say that the methanol produced from fermentation will be transported by vehicles and ran in factories that produce their own CO2.
3. The reaction is exothermic, increasing temperature pushes equilibrium in the endothermic direction. If you increase the temp too much, It's so far to the left/endothermic direction that no NH3 will form.
Quick Reply
Related discussions
- Should I repeat Chemistry exams?
- I want to study astrophysics but need help picking A-levels
- Using Old Spec to Revise New Spec (Maths, Chemistry, Biology) A level
- Study resources for edexcel IAL
- Life and Health science (step up science equivalent)
- Low AS UMS, should I give up on propspects of Oxbridge?
- Uclan university pharmacy
- help
- A-level Chemistry paper 2
- What A Levels are required to apply for bioinformatics?
- HELP im horrible at module 2 OCR chemistry
- Self-teaching Chemistry A-level (as a private candidate)?
- 5 A Levels too much?
- Ial edexcel notes/resource
- Video recommendations for AQA A Level Biology?
- What if I'm doing 4 A Levels but the actual offer from universities only require 3?
- Biology degree without chemistry A-level?!
- Applying to medicine, bad IGCSE results.
- Improving grades from AS to A2
- A2 chemistry
Latest
Trending
Last reply 1 week ago
Im confused about this chemistry question, why does it form these productsTrending
Last reply 1 week ago
Im confused about this chemistry question, why does it form these products
