What are the different types of JC Chemistry tuition classes available at your centre?

We have 3 modes of learning for students to choose from: weekly physical classes at Bishan; weekly online lessons via Zoom; and on-demand video lessons.

Are you the only Chemistry tutor conducting the classes or do you engage other tutors to do that?

Please be rest assured that I conduct all my classes personally and I do not engage other tutors to teach at my centre.

How well do your students perform after attending your H2 Chemistry tuition classes?

Most of my students showed improvements by at least 3 grades and more than 80% have attained distinction for A Levels. The earlier the students join my classes, the more confident I am in improving their grades.

What is your class size at Bishan?

Usually the class size is around 10 to 12 students. Max class size is 16 pax.

Is there makeup lesson if I miss a class?

Yes makeup lesson is available in the same week subject to availability. If makeup class is not possible, the student can view the recorded video lessons at Google Classroom.

Do you have trial lesson available? How much is it?

Yes we do. Fees for trial lesson are for Bishan class and for Zoom online class.

Does your centre offer O Level chemistry tuition? Do you teach IB / IP chemistry tuition? How about H1 Chemistry?

Chemistry Guru specialises in H2 Chemistry for JC1 and JC2 or IP Year 5 and IP Year 6 students only. Find out all the information about A Level H2 Chemistry and the detailed comparison between H1 and H2 Chemistry. We do not conduct lessons for H1 Chemistry, O Level Chemistry, IB Chemistry or IP Chemistry at IP Year 3 and IP Year 4.

A Level Chemistry 2017 Paper 1 Question 14 Solution - Exclusive

In this exclusive video we want to discuss the suggested solution for A Levels Chemistry (H2 Chemistry) 2017 Paper 1 Question 14.

Let Chemistry Guru, Singapore's top JC Chemistry tuition centre, guide you through this question:

A Level H2 Chem 2017 Paper 1 Question 14 Question

The topic tested in this question is on Chemical Equilibria. In particular the relationship between standard Gibbs free energy and equilibrium constant K given by the expression:

A Level H2 Chem 2017 Paper 1 Question 14 gibbs free energy and equilibrium constant expression

First we need to write out the K expression from the balanced equation.

A Level H2 Chem 2017 Paper 1 Question 14 Kc expression

Equimolar amounts of reactants H₂O and CO are used and the mole ratio of reactants and products are all the same.

This means the concentration of reactants H₂O and CO will remain the same, and the concentration of products H₂ and CO₂ will remain the same as well.

We need to determine when would concentration of product H₂ be greater than concentration of reactant H₂O. This means that K must be greater than 1.

We can substitute K > 1 back into the Gibbs free energy expression and deduce that standard Gibbs free energy must be negative.

A Level H2 Chem 2017 Paper 1 Question 14 gibbs free energy deduction

We can then look back at the graph to determine that points 3 and 4 are at negative standard Gibbs free energy. So the answer to this question has to be D.

A Level H2 Chem 2017 Paper 1 Question 14 graph deduction