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311_guide4

# 311_guide4 - ME/NE 311 Introduction to Thermal and Fluid...

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ME 311 Reading Guide #4 1/2 ME/NE 311 Introduction to Thermal and Fluid Sciences Reading Guide #4 Chapter 2 Sections 12 through 14 Section 2.12: Polytropic Processes for an Ideal Gas 1. A polytropic process is one in which the pressure varies inversely with the volume (or specific volume) raised to the ‘n’ power. T or F 2. Write the equation for work between state 1 and state 2 if a system undergoes a polytropic process with a value of ‘n’ equal to one. _______________________________________________________________________ 3. Is the process presented in #2 above restricted to ideal gases? Y or N 4. Write the equation for work between state 1 and state 2 if a system undergoes a polytropic process with a value of ‘n’ NOT equal to one. _______________________________________________________________________ 5. Explain why ‘an isothermal process of an ideal gas is polytropic with n=1.’ _________________ ______________________________________________________________________________________________________ 6. Under what conditions (restrictions or assumptions) will ‘n’ be equal to ‘k’, the latter of which is known as the ratio of specific heats? ____________________, _________________________, ________________________________, ___________________________________ 7. (Ask this question in class). How much variation in specific heat between the value at the

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311_guide4 - ME/NE 311 Introduction to Thermal and Fluid...

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