Class 9 Chemistry |New Book Chapter 5 Lecture 4 |Exothermic & Endothermic Reactions 🔥❄️|Punjab Board скачать в хорошем качестве

Class 9 Chemistry |New Book Chapter 5 Lecture 4 |Exothermic & Endothermic Reactions 🔥❄️|Punjab Board

📚 Complete Lecture Series: 📌 Class 9 Chemistry | Complete New Book (Chapters 1-13) | Punjab Board 🔥📘 👉 Watch the full playlist here:    • Class 9 Chemistry | Complete New Book (Cha...   In this lecture, we discuss Exothermic & Endothermic Reactions, including: ✔️ Definition & Differences Between Exothermic and Endothermic Reactions ✔️ Heat Absorption & Release in Chemical Reactions ✔️ Energy Profile Diagrams for Exo & Endothermic Reactions ✔️ Real-Life Examples & Applications ✔️ Step-by-Step Enthalpy Change Calculations 📌 Exercise Questions Discussed: 🔹 Why does the chemical reaction between sodium metal and water proceed violently? 🔹 Is melting of ice an exothermic or endothermic change? 🔹 Can exothermic reactions be reversed? 🔹 Calculate the enthalpy change of the reaction: H₂ + I₂ → 2HI 🔹 Calculate the enthalpy change for the formation of one mole of liquid water ✅ This lecture is specially designed for Class 9 students under the Punjab Board system, covering: ✅ Board of Intermediate and Secondary Education, Lahore ✅ Board of Intermediate and Secondary Education, Faisalabad ✅ Board of Intermediate and Secondary Education, Multan ✅ Board of Intermediate and Secondary Education, Rawalpindi ✅ Board of Intermediate and Secondary Education, Gujranwala ✅ Board of Intermediate and Secondary Education, Bahawalpur ✅ Board of Intermediate and Secondary Education, Sargodha ✅ Board of Intermediate and Secondary Education, Sahiwal ✅ Board of Intermediate and Secondary Education, Dera Ghazi Khan 🎯 Watch till the end to fully understand heat changes in chemical reactions! 📌 Stay Connected: 👉 Like, share, and subscribe for more Punjab Board Chemistry lectures! #Class9Chemistry #Exothermic #Endothermic #HeatChange #Thermodynamics #Enthalpy #PunjabBoard #NewBook2025 #ScienceForPakistan #ReactionEnergy #LahoreBoard #FaisalabadBoard #MultanBoard #RawalpindiBoard #GujranwalaBoard #BahawalpurBoard #SargodhaBoard #SahiwalBoard #DeraGhaziKhanBoard #EducationalContent