9Th Class Chemistry New Book 2025 || Lecture 2 || Chapter 5, Energetics
Exothermic and Endothermic reactions National curriculum of pakistan 2023 This video is about first lecture of chemistry new book 2025 and unit 5 of all punjab boards for 2025 and onwards. Fifth chapter of new chemistry book is about chemical energy, heat energy, exothermic reaction and endothermic reactions, system and surroundings, enthalpy and how does a reaction takes placeaerobic and anaerobic respiration. #9thchemistrynew
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9Th Class Chemistry New Book 2025 || Lecture 1 || Chapter 5, Energetics
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