In the previous blog posts, we have talked about the different Standard Enthalpy Changes of Reactions as well as look into using Energy Cycles with Hess’ Law to solve Chemistry questions related Chemical Energetics.
Today, i am going to re-post a question for discussion which i have blogged about several years back. This questions is evergreen and you will be seeing such questions again in your upcoming A-Level H2 Chemistry examinations.
The following question was sent by one of our A-Level JC1 H2 Chemistry students in Singapore.
It is a very is simple yet interesting MCQ question and requires the students to be very good in drawing the Energy Cycle Diagram, in order to solve the question.
In fact, you can also solve this question using Algebraic Method.
My student thinks that the answer should be option “B”‘. Do you agree with her?
Show your working or brief explanation on arriving at your answer.
“80% of the Success is about taking the Necessary Actions”
I hope you find the content easy for your understanding and if you have any questions, leave me a comment below. Feel free to share this blog post with your friends.
Do stay tuned to the upcoming posts as i will be discussing on the applications of Enthalpy Changes using Hess’ Law. I will also be sharing the concepts and applications involved in Entropy Changes and Gibbs Free Energy.
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PS: Under related articles below, there are several blog post discussions and questions related to Chemical Energetics. You can also do a keyword search using the search box at the top right hand corner.
PPS: If you need help with your A-Level H2 Chemistry, do join us in our weekly A-Level H2 Chemistry Tuition Class.
- Chemical Energetics: Application of Hess’ Law & Energy Cycle Diagram
- Chemical Energetics: Definitions of Standard Enthalpy Changes of Reactions
- Chemical Energetics: Application of Gibbs Free Energy in Thermodynamics
- Chemical Energetics: Experimental Method to Determine Enthalpy Change of Combustion
- Chemical Energetics: Entropy (S)