help me with ap chem xD

Discussion in 'Odds & Ends' started by zeratul90, Dec 6, 2009.

  1. zeratul90

    zeratul90 Rookie

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    Ok, does anyone know how to calculate the energy absorbed to produce water vapor? I was given the molar head of vaporization for water which is 40.79 kj/mol, but i'm not sure wtf i'm supposed to do with it.

    Also, i need to calculate the total heat gained by water in the calorimeter which would be the heat gained of H2O(liquid) + heat gained of H20(gas). Calculating them would simply be using the q=mc*delta t but, how do i calculate the temperature of the water vapor?

    Thanks! :)
     
    #1
  2. Court_Jester

    Court_Jester Hall of Fame

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    The problem is incomplete. Can you provide the complete statement of the problem? Are you supposed to vaporize all of the water?
     
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  3. Bud

    Bud Bionic Poster

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    Something's missing... transcribe the entire problem.

    Do you mean the energy required to vaporize a certain volume of water?
     
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  4. edberg505

    edberg505 Legend

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    Yeah, I'm with everyone else here. I think something is lost in translation. Need to see the entire problem in full.
     
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  5. zeratul90

    zeratul90 Rookie

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    nvm guys, i asked my friends today at school how it was supposed to be done (rather i just copied), apparently they were too "busy" last night to respond to me when i sent a message every hour from 5pm-12pm -_- Thanks though!
     
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