Piston–Cylinder with Stops | First Law Example (Problem 4.35, Mech3001 Week 5)

Step-by-step solution of a piston–cylinder with stops using the First Law of Thermodynamics (closed system energy balance). We draw the process on a P–V diagram and carefully compute final state, boundary work, and total heat transfer. Ideal for: Mechanical engineering students in Thermodynamics I (Mech3001) preparing for exams or assignments, especially those using Problem 4.35 from common thermo textbooks. Problem Statement: 4.35 A piston-cylinder device initially contains 0.8 m3 of saturated water vapor at 250 kPa. At this stage, the piston is resting on a set of stops, and the mass of the piston is such that a pressure of 300 kPa is required to move it. Heat is now slowly transferred to the steam until the volume doubles. Show the process on P-V diagram with respect to the saturation lines and determine: a) The final temperature b) How much work does the water do on the piston? c) Find the total Heat Transfer? What you’ll learn in this video: How to model a piston–cylinder device with mechanical stops How to track phase changes of water (saturated mixture → superheated) How to sketch the process relative to saturation lines on a P–V diagram How to calculate boundary work and total heat transfer using property tables 🎓 Can you trust the answers and solutions provided? Well, you never should trust anything 100%. Make sure you are checking for yourself. When I’m solving the questions, I always solve on my own and then check the results against other sources. If there is divergence, I look for more sources. So while I can’t promise you everything will be 100% correct, I can promise I’ve done my due diligence before posting. Part of this description text was created using an AI language model called ChatGPT If you enjoyed this video, please press the bell 🔔, like 👍, comment or share. You're the best, thanks! --------------------------- 🌍 Please Subscribe:    / @engineeringhack   --------------------------- 🎥Watch More Videos: • Intro to linear momentum:    • Intro to Linear Momentum Conservation | Bu...   • Pulley-collar energy approach:    • Collar & Pulley | Solving with energy cons...   • Intro to pulley-collar problem:    • Intro to Collar & Pulley System | Accelera...   • Playing pool:    • Billiard Balls | Linear Momentum Conservat...   --------------------------- Keywords: thermodynamics example, piston cylinder with stops, saturated water vapour, first law of thermodynamics, closed system energy balance, boundary work, heat transfer, P–V diagram, Mech3001, Problem 4.35