Understanding Exothermic & Endothermic Dissolution | Science Unit 1 Lesson 1 (Prep 2 - Part 2) скачать в хорошем качестве

Understanding Exothermic & Endothermic Dissolution | Science Unit 1 Lesson 1 (Prep 2 - Part 2)

Welcome back to ON SCIENCE! In this second part of our deep dive into Science Unit 1, Lesson 1 for the Second Term (Prep 2), we explore the fascinating world of thermal energy changes during chemical dissolution. 🧪🌡️In this video, Mr. Mohamed El-Shahawy breaks down complex concepts into easy-to-understand segments, focusing on how substances interact with water to either release or absorb heat.📍 What You’ll Learn in This Lesson:Exothermic vs. Endothermic Dissolution: Learn the fundamental differences between reactions that release heat (Exothermic) and those that absorb it (Endothermic) [00:42].Final vs. Initial Temperature: Understand why final temperature is higher in exothermic processes and lower in endothermic ones [00:23].Anhydrous vs. Hydrated Substances: A detailed explanation of how the presence of water molecules in a salt (like Copper Sulfate) completely changes its thermal behavior upon dissolution [02:48].Practical Lab Safety: Why you should always add acid to water (and never the reverse!) to avoid violent, dangerous reactions [11:32].Direct Relationships in Chemistry: How the mass of a solute directly impacts the total change in temperature ($\Delta T$) [17:03].Real-World Applications: How "Instant Cold Packs" and "Instant Heat Packs" work to treat muscle fatigue and swelling using Ammonium Nitrate and Magnesium Sulfate [26:19].📑 Key Timestamps for Quick Navigation:[00:00] - Introduction to Thermal Changes.[02:00] - Examples of Exothermic Substances (Sodium Hydroxide, Calcium Chloride).[03:12] - The difference between Anhydrous and Hydrated Copper Sulfate.[09:56] - Cobalt Chloride color changes (Pink to Blue).[11:03] - Safe handling of concentrated acids.[15:01] - Analyzing the relationship between Mass and Temperature Change.[18:50] - Understanding Variables: Independent, Dependent, and Controlled.[27:39] - Medical uses of Exothermic and Endothermic reactions.Resources & Support:If you found this video helpful, please:✅ Subscribe to the channel for more Science Prep 2 lessons.🔔 Turn on Notifications so you don't miss Part 3 (Exercise Solving).💬 Comment Below if you have any questions about specific parts of the lesson!Presented by: Mr. Mohamed El-ShahawyChannel: ON SCIENCE#SciencePrep2 #Chemistry #Exothermic #Endothermic #MiddleSchoolScience #ScienceEducation #OnScience #MohamedElShahawy