MYTUTOR SUBJECT ANSWERS

710 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...

1 year ago

Answered by Abigail, a GCSE Chemistry tutor with MyTutor


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

358 SUBJECT SPECIALISTS

£18 /hr

Christopher B.

Degree: Medicine (Bachelors) - St. Andrews University

Subjects offered:Chemistry, Maths+ 3 more

Chemistry
Maths
Biology
.UKCAT.
.BMAT (BioMedical Admissions)

“I'm a straight A* medical student at the University of St Andrews. I have a patient and personal approach to tutoring. Let's arrange a free meeting!”

PremiumJames L. A Level Biology tutor, A Level Chemistry tutor, GCSE Biology...
£24 /hr

James L.

Degree: Medical Sciences (Bachelors) - Exeter University

Subjects offered:Chemistry, Science+ 4 more

Chemistry
Science
Physics
Maths
Biology
-Personal Statements-

“Hi, I'm James, a Biology Masters graduate. I'm really passionate about science, and I hope i can share some of my interest with you!”

£22 /hr

Eleanor H.

Degree: Biochemistry (Bachelors) - Bristol University

Subjects offered:Chemistry, Maths+ 1 more

Chemistry
Maths
Biology

“ABOUT ME: I am a biochemistry student, currently studying at the University of Bristol, and have had a passion for the natural sciences from a very young age. I am patient, hardworking and experienced, having tutored students in Maths...”

About the author

Abigail C.

Currently unavailable: for regular students

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

How do perturbations to a system affect the equilibrium position of a reaction?

Name the type of reaction that takes place when calcium carbonate is heated strongly?

Sodium hydroxide reacts with hydrochloric acid, what are the products formed?

Describe the difference between a covalent and an ionic bond. Give examples.

View GCSE Chemistry tutors

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

mtw:mercury1:status:ok