Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Physical Chemistry problem,please help!

  1. Feb 15, 2007 #1
    Can someone help me with this problem?

    Things that are given: ΔHf:enthalpy change ΔGf:Gibbs energy change

    for p=1atm and T=25 C

    ΔHf(kcal/mol) ΔGf(kcal/mol)
    H2O(g) -57.79 -54.63
    H2O(l) -68.32 -56.69

    1)Vapour pressure of H20 at T=25 C
    2)Vapour pressure of H2O at T=50 C
    3)The maximum work (kJ/mol) that we can take with electrochemical burn of H2 on a fuel cell at T=25 C:
    4)The heat,Q,that goes out on the surrender(kJ/mol) for the 3rd problem
    5)How much kg H2 are required for a car with 100HP to travel a distance of 500km in 4h?
    6)What is the ΔS of H2(g)+1/2O2(g)=H2O(g)?

    Sorry for the bad english!I would highly appreciate it if someone could help me...
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?