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Calculating value of delta G

  1. May 13, 2012 #1
    The problem statement, all variables and given/known data

    Calculate the value of Go for the formation of 1 mol of phosphorus trichloride from its constituent elements:

    P2(g) + 3 Cl2(g) ---> 2 PCl3(g)



    The attempt at a solution

    I thought of trying delta G = delta H - T deltaS , but I'm lost on where to start.



    Thank you
     
  2. jcsd
  3. May 13, 2012 #2
    * Calculate the value of ∆G for the formation of 1 mol of phosphorus trichloride from its constituent elements

    Sorry, typed in Go instead of ∆G.

    I figured out ∆H and ∆S already (not sure if it's correct)

    ∆H = -725.2 kJ
    ∆S = 263.6 J/K

    but in the equation ∆G = ∆H - T∆S I'm not sure what the temperature is suppose to be. I got the thermodynamic quantities at 25 degrees Celsius, do I use that as T even though it doesn't state the temperature in the question?

    Thanks
     
    Last edited: May 13, 2012
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