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anonymous

  • one year ago

Help i'm stuck on a thermodynamics(heat engine) problem

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  1. anonymous
    • one year ago
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    A piston contains 100 moles of an ideal monatomic gas that initally has a pressure of 2.19 × 105 Pa and a volume of 2.7 m3. The piston is connected to a hot and cold reservoir and the gas goes through the following quasi-static cycle accepting energy from the hot reservoir and exhausting energy into the cold reservoir. The pressure of the gas is increased to 5.19 × 105 Pa while maintaining a constant volume. The volume of the gas is increased to 9.7 m3 while maintaining a constant pressure. The pressure of the gas is decreased to 2.19 × 105 Pa while maintaining a constant volume. The volume of the gas is decreased to 2.7 m3 while maintaining a constant pressure. It may help you to recall that CV = 12.47 J/K/mole and CP = 20.79 J/K/mole for a monatomic ideal gas, and that the number of gas molecules is equal to Avagadros number (6.022 × 1023) times the number of moles of the gas.

  2. anonymous
    • one year ago
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    The question asks, How much energy is transferred into the gas from the hot reservoir?

  3. anonymous
    • one year ago
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    So i know we have to use PV=nRT to solve for initial temp T = PV/nR i have done this and the T initial comes out as 711.14 K Now i have to calculate for delta T when the pressure increases (step 1, constant V) and also delta T when the volume increases (step 2, constant P)

  4. anonymous
    • one year ago
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    With each change in pressure and volume, each temperature in each step will change

  5. anonymous
    • one year ago
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    @nincompoop I wanted to know if you are familiar with the topic of thermodynamics in Physics dealing with heat engines? if you are can you possible help me with this question?

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