Stop Failing Physics Numericals! Ch 15 Molecular Theory of Gases (Step-by-Step)

📚 Class 12 Physics | Chapter 15: Molecular Theory of Gases (Complete Numerical Solutions) Hello Students! 🎓 Are you finding Physics *Numericals* challenging? Don't worry! In this detailed video lecture, we will solve *every single exercise numerical* from Chapter 15, "Molecular Theory of Gases," of your **Class 12 Physics textbook (Sindh Board)**. We explain each step in a simple, easy-to-grasp manner. 🌟 What You Will Learn in This Video: This lecture covers the complete numerical section of Chapter 15, focusing on key concepts such as: Solving problems related to the *Ideal Gas Equation* (PV = nRT). Step-by-step calculation of *Root Mean Square (RMS) Velocity* of gas molecules. Application of formulas for *Gas Pressure* and **Kinetic Energy**. Mastering unit conversions and data representation exactly as required for board exams. 🚀 Why Numericals are Crucial for Board Exams: In the Intermediate Part-II (HSC-II) Sindh Board examinations, *Chapter 15* almost always features a compulsory numerical question in Section 'B' or 'C'. By mastering the problems solved in this video, you can secure valuable marks and boost your overall score! This is a must-watch session for exam candidates and self-study learners. *Note:* We focus on the official textbook exercises, making this resource highly relevant for Karachi, Hyderabad, Sukkur, and Larkana Board students. 📝 Key Formulas Discussed and Used: 1. *Ideal Gas Equation:* PV = nRT 2. *Pressure Equation:* P = 1/3pv2 3. **Average K.E. per Molecule K.E = 3/2kT ⏱️ Video Timestamps for Quick Reference: 00:00 – Introduction & Chapter Overview 01:45 – Importance of Chapter 15 Numericals 03:00 – Numerical Problem 1 (Ideal Gas Law Application) 08:20 – Numerical Problem 2 (RMS Velocity Calculation Explained) 14:50 – Numerical Problem 3 (Gas Pressure & Density) 20:15 – Exam Tips: How to Present Numerical Solutions 23:45 – Final Review and Conclusion 👍 Support Our Channel: If this video helped you understand the numerical concepts, please hit the *Like* button! *Share* this video with your classmates and study groups. Don't forget to *Subscribe* to our channel and press the bell icon so you don't miss our next exam-focused lectures! *What topic should we cover next? Let us know in the comments below!* The freezing point of mercury is -39°C.Convert it into °F and the comfort level temperature of 20° into Kelvin. (Ans: -38.2°F, 293K) The boiling point of liquid nitrogen is -321°F. Change it into equivalent Kelvin temperature. (Ans: 77K) Calculate the volume occupied by a gram-mole of a gas at 0°C and a pressure of 1.0 atmosphere. (Ans: 22.4 liters/mole) An air storage tank whose volume is 112 liters contain 3kg of air at a pressure of 18 atmospheres. How much air would have to be forced into the tank to increase the pressure to 21 atmospheres, assuming no change in temperature? (Ans: 0.5kg) A balloon contains 0.04m3 of air at a pressure of 120KPa. Calculate the pressure required to reduce its volume to 0.025 m3 at constant temperature. (Ans: 1.9 x 105Pa) The molar mass of nitrogen gas N2 is 28gmol-1. For 100g of nitrogen, calculate. (a) the number of moles. (Ans: (a) 3.57 mole) (b) the volume occupied at room temperature (20°C) and pressure of 1.01 x 105 Pa. (Ans: (b) 0.086m3) A sample of a gas contains 3.0 x 1024 atoms. Calculate the volume of the gas at a temperature of 300K and a pressure of 120K Pa. (Ans: 0.104m3) Calculate the root mean square speed of hydrogen molecules at 0°C and 1.0 atm pressure. Assuming hydrogen to be an ideal gas. The density of hydrogen is 8.99 x 10-2 kg/m3. (Ans: 1835.86ms-1) Calculate the root mean square speed of hydrogen molecule at 500K (mass of proton =1.67 x 10-27 kg and K = 1.38 x 10-34 J/molecule .K) (Ans: 2489.49ms-1) (a) Determine the average value of the Kinetic energy of the particles of an ideal gas at 10°C and at 40°C. (Ans: 5.86x10-21J, 6.48x10-21J) (b) What is the Kinetic energy per mole of an ideal gas at these temperatures? (Ans: 3526.57J, 3901J) #karachiboard #physicsnewbook #xiiphysicsnewbook #physicsnewbook #mastercoachingcenter #mastercoaching #mastercoachingcenterofficaial #sirsalman #sirsalmanariftabani #mcc #class11#class12 #class9 #class10 #Class12Physics #SindhBoard #PhysicsNumericals #MolecularTheoryOfGases #HSCPart2 #BoardExamPreparation #PhysicsLecture #KMT #IdealGasLaw #NumericalsSolved #IntermediatePhysics