Hey there! Sign in to join this conversationNew here? Join for free

Calculate △fH for S02 Watch

Announcements
    • Thread Starter
    Offline

    12
    ReputationRep:
    2H2S + SO2 -> 3S + 2H20

    △H: -145.6 kJmol^-1

    △fH:

    H2S = -20.6
    S02 = ?
    S = 0
    H20 = -241.8

    This is what I did:

    First I rearranged the equation to give me S02 = (2x-241.8) - (2x-20.6) + 145.6.
    Simplified, this gave me -483.6 - 104.4 to give me -588.

    The actual answer is -296.8 and I'm not sure how to get that so any help would be appreciated, thanks.
    Offline

    17
    ReputationRep:
    -145.6 = - (2 x -20.6) - x + (3 x 0) + (2 x -241.8)
    x = -296.8
 
 
 
  • 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
    Will you be richer or poorer than your parents?
  • 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.