Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    6
    ReputationRep:
    Which reaction will occur nonspontaneously?
    a. Au3+ + 3e- → Au
    b. Mg + 2H+ → Mg2+ + H2
    c. F2 + 2e- → 2F-
    d. Li+ + e- → Li
    e. 2Na + Cl2 + 2e- → 2NaCl

    They gave no Gibbs energy or anything related just the equations, how would you work out the answer based on the equations?

    Thanks
    Offline

    18
    ReputationRep:
    Are you sure you haven't got (or allowed) a table of electrode potentials?
    • Thread Starter
    Offline

    6
    ReputationRep:
    Nope
    (Original post by EierVonSatan)
    Are you sure you haven't got (or allowed) a table of electrode potentials?
    Offline

    9
    ReputationRep:
    You know gibbs needs to be below zero, and presumably only 1 answer is correct.
    You haven't got enthalpy values or temp values presumably.
    So you need the biggest entropy increase - and that reaction will be the one producing a gas.
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    What newspaper do you read/prefer?
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.