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Homework Help: Thermodynamic constant volume process

  1. Sep 21, 2012 #1
    1. The problem statement, all variables and given/known data

    In a constant-volume process, 208 J of energy is transferred by heat to 0.99 mol of an ideal monatomic gas initially at 290 K.
    (a) Find the work done on the gas.

    (b) Find the increase in internal energy of the gas.

    (c) Find its final temperature.

    I just don't know which equation to use and don't really know which direction to take.
    2. Relevant equations

    Pretty sure it involves ΔU=W+Q

    3. The attempt at a solution
  2. jcsd
  3. Sep 21, 2012 #2

    Simon Bridge

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    Start by drawing a PV diagram of the process.

    The work done is the area under the P-V curve.
    The equations you want are the ideal gas law, something to relate internal energy to work and heat, and something to relate change in internal energy to temperature in a constant volume process.
  4. Sep 22, 2012 #3

    Andrew Mason

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    Is there any work done? Plug that value into your equation.

    Can you find the heat flow, Q? Plug that into your equation.

    That will give you the change in internal energy.

    How is Q related to change in temperature? (think: heat capacity of the gas).

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