You must complete The Periodic Table of Elements to unlock this lesson.
Please subscribe to the Subject to access the lesson.

CHEMICAL REACTIONS

A chemical reaction is a process where a set of substances undergo a chemical change to form a different substance.

Reactants and Products

Reactants and reagents are the substances that are used to bring about the chemical reaction. A reactant is any substance that is consumed or used up during the reaction. The substance that is produced by a chemical reaction is called the product.

Chemical reactions can be represented simply on paper by chemical equations involving only formula and symbols e.g.

Reaction time: The total time taken for a particular reaction to take place.

Reaction rate: is the number of moles of reactions converted or product formed per unit time. Unit is moldm-3s-1

In all chemical reactions, existing bonds in the reactants particles must be broken first before new bonds can be formed to form products. The breakings of bonds require energy. An initial energy input is required to activate the reactant particles. This energy is the activation energy of the reaction. The activation energy of a reaction is equivalent to that energy barrier that must be overcome before bonds are broken to enable the reaction to occur.

Please subscribe to the Subject to access the lesson.
Lesson tags: Chemistry Lesson Notes, Chemistry Objective Questions, SS2 Chemistry, SS2 Chemistry Evaluation Questions, SS2 Chemistry Evaluation Questions First Term, SS2 Chemistry First Term, SS2 Chemistry Objective Questions, SS2 Chemistry Objective Questions First Term
Back to: CHEMISTRY – SS2 > First Term
© [2020] Spidaworks Digital - All rights reserved.

We are resetting the game!

ClassHall is built on game design principles, and the top performers are the MVPs!

By 11:59 pm Dec. 31st, 2019, we will reset all user performance data, including points and ranks to enable newcomers compete favourably for the limelight!

Prizes will be given to the top 5 MVPs of the Hall of Fame, at the end of the 2019/2020 academic session.

Earn a referral fee per user for recommending us to your students, colleagues and school admins.

Heard of our TRC?

We believe teachers should earn their full reward on earth!

Congratulations to the TOP 5!

Sophia Awhata

Final Points

2709

Rank

Senior Prefect

Seun Adeniyi

Final Points

2395

Rank

Prefect

Mary Adebayo

Final Points

1669

Rank

Prefect

Aderonke Babalola

Final Points

975

Rank

Student

Olufunke Fasipe

Final Points

932

Rank

Student

Classhall live video classes

LIVE VIDEO CLASSES!

You’re missing out if you haven’t joined our live video classes. NO ADDITIONAL COST if you are on a termly or yearly subscription plan.