# [J1] Lesson 38 (Mechanics Year End Revision Part 3 + Differentiation+ Chemical Kinetics 1)

[J1 Physics PMCians] Mock Promo Paper 1

What we did in 2 hours:

This week, we conducted a timed trial test for Paper 1.

The 20 questions reviewed the concepts of Mechanics, and also tested on options topics (Waves-Superposition, SHM, Thermal Physics & Electric-field).

We are confident the review was valuable, not only to reinforce the problem solving techniques, but a fast review of the topics.

What you take home:

Mechanics The Last Lap Mock P1 Option Questions (worked solutions)

For reference only:

https://tinyurl.com/y45rt6zf

Special Mention:

Next week, we gear up for our countdown to the Promo exam.

Be prepared for a Mock Paper 2 – structured questions.

Use the coming week to ensure you can clinch all the marks for Definitions

From you friendly tutors,

Mr Sim & Mr Kwok 🙂

[J1 Maths PMCians]

What we did in 2 hours:

We started our final chapter, which is also one of the most important promo chapters, Differentiation and Applications. We looked at the gradient graph and questions involving parametric graphs and equations. Remember and practice the process we use to sketch the gradient graph – it is a systematic and effective one!

Additionally, we covered applications involving geometry and maxima/minima. We noted that geometry can be the bigger challenge in many differentiation questions – it is essential to build up experience here! Also, note how squaring both sides and using implicit differentiation can be a very efficient way of dealing with maxima/minima questions!

What you take home:

Take-Away questions and other worked solutions are linked here:

https://tinyurl.com/y22b639f

Worked solutions for Differential Equations Express set have been updated too.

Special Mention:

We are moving into the final lesson before promos, with more differentiation. Let’s make it a good one.

See You and Stay Healthy!

[J1 Chemistry PMCians]

What we did in 2 hours:

The 4 hour additional lesson this week brought us to revise Energetics, which is a key feature when it comes to predicting the spontaneity of a reaction. This includes applying the ten basic definitions of the enthalpy changes, and applying the five shortcuts which are all derived from the Hess’ Law. We did not stop there – we went on to specifically discuss the real measure of spontaneity – the Gibbs’ free energy change, relating it to the concept of entropy.

During our weekend lesson, we completed our discussion on calculations involving equilibrium. The equation that relates equilibrium constant and Gibbs’ free energy change was also discussed. We progressed towards the last revision chapter on Kinetics. We discuss the different aspects of the rate equation, as well as understand the three orders of reaction. We paid particular attention to first order reactions due to their characteristic constant half-life, and saw how we can apply pseudo-order reactions to calculate half-lives of the reaction.

What you take home:

The corrected solutions to Q9 of Energetics is found here:

https://tinyurl.com/y5algs6z

Special Mention:

Next up, let us look at how we can find the order of reaction depending on the type of data provided. We will conclude by looking at the connections between rate equation, its reaction mechanism and its energy profile diagram.

Gentle reminder to watch the additional lessons if you have not done so!

Stay healthy!

Mr Leong

REDEEM A FREE TICKET FOR YOUR FRIEND 🙂

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Take note:

• This ticket can only be redeemed once.
• The guest must attend lesson either onsite or online with you at the same timeslot.
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• Redemption period strictly before 30 September 2020. See you!