Given enthalpy changes of combustion for C, H₂, and C₂H₅OH, calculate the enthalpy of formation of ethanol. Correct Answer: ΔH_f = [2ΔH_c(C) + 3ΔH_c(H₂)] - ΔH_c(C₂H₅OH) Why the answer matters: The algebraic manipulation is the hardest part. The answer key shows the cycle diagram and the algebraic sum . Memorizing the formula is useless; learning the method is gold.
Hkdse Chemistry - A Modern View: (Second Edition) | PDF - Scribd
When you see a discrepancy, ask your teacher: “The answer key says X, but I got Y using method Z. Is both acceptable under HKDSE marking?” This question alone will impress your teacher. hkdse chemistry a modern view book 2 answer
6. HKDSE NEW CHEMISTRY A Modern View Book 2A. Suggested Answers. 9. ( a) Iron powder reacts slowly with the acid and dissolves (
HKDSE Chemistry A Modern View Book 2 Answer Given enthalpy changes of combustion for C, H₂,
: Molarity, concentration of solutions, and volumetric analysis. Organic Chemistry
– Covers basic properties, reactions with metals/carbonates, and ionic equations. Memorizing the formula is useless; learning the method
: Often used by students to share answer keys for Book 2B, specifically covering addition polymers and hydrocarbons.
: Provides detailed PDF versions of the Book 2A Suggested Answers, including chemical equations for reactions like iron powder with acid.
Many top-tier schools (e.g., La Salle, DGS, QC) have student-run study groups where they compile for A Modern View Book 2. If you cannot get the official copy, compare three different student-made answer sets. Where they agree, it is likely correct. Where they differ, ask your teacher for clarification.
The "HKDSE Chemistry: A Modern View" series by Aristo Educational Press is a cornerstone resource for students preparing for the Hong Kong Diploma of Secondary Education. Specifically, (which includes Books 2A and 2B) covers critical syllabus areas including Acids and Bases , Fossil Fuels , and Carbon Compounds .
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