MYTUTOR SUBJECT ANSWERS

238 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...

7 months ago

Answered by Abigail, a GCSE Chemistry tutor with MyTutor


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

165 SUBJECT SPECIALISTS

£18 /hr

Freya C.

Degree: Geography (Bachelors) - Leeds University

Subjects offered: Chemistry, Maths+ 2 more

Chemistry
Maths
Geography
Biology

“Me I am a geography student at Leeds University. I love using science to help explain the world around us, and I use the science and maths I learnt at school in my degree course all the time! I hope that I can help inspire my students ...”

MyTutor guarantee

£18 /hr

Roshni R.

Degree: Dentistry (Bachelors) - Birmingham University

Subjects offered: Chemistry, Spanish+ 4 more

Chemistry
Spanish
Maths
Biology
-Personal Statements-
-Medical School Preparation-

“Tutoring approach Professional but friendly approach.  Work with my students to identify the areas the student is finding most difficult. Review the topic with my hand-written notes.  Explain any misunderstood areas. Work through examp...”

£22 /hr

Shruti V.

Degree: Biomedical Engineering (Masters) - Southampton University

Subjects offered: Chemistry, Physics+ 2 more

Chemistry
Physics
Maths
-Personal Statements-

“Who Am I? I am a Masters Biomedical Engineering student at the University of Southampton, having already completed a degree in Aerospace Engineering achieving a First Class (Honours). I have a real passion and love for science and ma...”

About the author

Abigail C.

Currently unavailable: for new 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

What are polymers and why are they useful?

What is a mole?

what is an ion? and how are they made?

What mass of carbon dioxide is produced from burning 100 grams of ethanol in oxygen according to this reaction: C2H5OH + 3 O2 --> 2 CO2 + 3 H2O

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