MYTUTOR SUBJECT ANSWERS

168 views

An equilibrium between hydrogen and nitrogen to make ammonia. Explain what would happen to the amount of product if a) pressure was increased b) temperature was increased c) a catalyst was added. Energy change -92KJ/mol

This is quite a complicated sounding question but it is actually quite simple if you break it down! Start by writing a balanced equation for the reaction:

3H2 (g) + N2 (g) => 2NH3 (g)

Now you can see there is four molecules on the left and two on the right, which will help with the answer. It is a good habit to always write your state symbols, especially when this question mentions pressures.

Remember causing a change in the conditions of an equilibrium results in changes to get the equilibrium back to normal.

a) An increase in pressure will cause the amount of product to increase. The equilibrium will shift to the right where there are fewer molecules in order to counteract the change, and decrease the pressure.

b) The reaction is exothermic, which means it has a negative enthalpy change, ie it gives out heat. The amount of product will decrease. The equilibrium will move to the left in the endothermic direction in order to cool the reaction, so less ammonia is produced.

c) This is a bit of a trick question! Think about it: a catalyst basically speeds up a reaction. If the reaction is at equilibrium, the catalyst will simply speed up the reaction in both directions, and not have an affect on the amount of product formed, but just cause the product to be formed more quickly.

Abigail C. A Level Biology tutor, GCSE Chemistry tutor, GCSE Maths tu...

5 months ago

Answered by Abigail, a GCSE Chemistry tutor with MyTutor

Still stuck? Get one-to-one help from a personally interviewed subject specialist

162 SUBJECT SPECIALISTS

£18 /hr

Mohammad M.

Degree: General Engineering (Bachelors) - Durham University

Subjects offered: Chemistry, Physics+ 2 more

Chemistry
Physics
Maths
Arabic

“I am studying Engineering at Durham University. From a very early age I have been fascinated by machines; how they work, how they have developed over time, and how they are useful in society today. I have a keen interest in motors and ...”

£18 /hr

Tate C.

Degree: Mechanical Engineering (Masters) - Bath University

Subjects offered: Chemistry, Physics+ 1 more

Chemistry
Physics
Maths

“My name is Tate. I am, immensely interested in everything Physics simply because I really see no subject offering the same level of awe inpsiring information that consistently motivates me to go and learn more. I love it so much Ieven...”

MyTutor guarantee

£24 /hr

Edward H.

Degree: Geography (Masters) - Oxford, Balliol College University

Subjects offered: Chemistry, Music+ 7 more

Chemistry
Music
Maths
Mandarin
Geography
French
English
.TSA. Oxford.
-Personal Statements-

“I am a Geography student at Oxford University, but I also have experience tutoring in Maths, Chemistry, English, French, Mandarin Chinese, and Music. I am an ethusiastic and dedicated individual, tailoring my classes to the needs of ea...”

About the author

£18 /hr

Abigail C.

Degree: Biosciences (Masters) - Durham University

Subjects offered: Chemistry, Maths+ 1 more

Chemistry
Maths
Biology

“About me I am studying biological sciences at Durham University. I have always really loved science, and I hope to enthuse others with this and help them to be willing to learn. There were some topics I found challenging but eventua...”

You may also like...

Posts by Abigail

An equilibrium between hydrogen and nitrogen to make ammonia. Explain what would happen to the amount of product if a) pressure was increased b) temperature was increased c) a catalyst was added. Energy change -92KJ/mol

Explain what the stages of protein folding are and how the protein is held in its 3D shape

Make x the subject of the equation y=(2(1+x))/(3x-1)

Other GCSE Chemistry questions

What factors affect rate of reaction?

How do reversible reactions reach an equilibrium?

Explain the atomic structure of an Atom?

What is the difference between an Atom and an Ion?

View GCSE Chemistry tutors

Cookies:

We use cookies to improve our service. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok