🔍 Key Concepts

• Ideal Gas Law (PV = nRT) relationship between temperature, pressure, and volume • Effect of adding heat (thermal energy) to a confined gas vs a gas that can expand • What happens to gas properties in a combustion section of a gas turbine or engine

💭 Think About

• If you add heat to a gas and let it expand freely (not in a rigid container), which properties are most likely to change first? • In a combustion section, is the main goal to get a small, dense gas or a large, fast-moving gas? How does that relate to volume and pressure? • Think about how hot exhaust behaves when it exits an engine: does it tend to spread out or contract?

✅ Before You Answer

• Verify how temperature increase affects volume when pressure is allowed to change. • Check what the combustion section is designed to produce: mainly high-velocity, expanded gas or mainly high static pressure? • Decide whether the exam is focusing on volume change or pressure change as the primary effect of adding thermal energy in this context.