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  1. #1
    Banned Jack612blue's Avatar
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    Calculate the amount of heat gained... (Calorimetry)

    By the chemical system of ammonium nitrate

    same hint:

    qrxn = - (qwater + qcalorimeter).

    The heat lost by the calorimeter water, qwater, depends on the specific heat of water, Csp and ΔT, while the heat lost by the calorimeter, qcalorimeter, depends on the heat capacity, cp and ΔT.

    Temperature initial 9.8 degrees celcius
    Temperature final 21.5 degrees celcius
    Mass water 25.086 Grams.
    Mass of ammonium nitrate(salt) 5.109 Grams.
    Last edited by Jack612blue; 01-29-2012 at 12:47 AM.
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  2. #2
    Registered User JustinPSherman's Avatar
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    still haven't gotten this yet? lol
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  3. #3
    Banned Jack612blue's Avatar
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    no bro.

    Will paypal anyone $10 who figures out this mysterious ****
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  4. #4
    Banned Jack612blue's Avatar
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    bump
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  5. #5
    Registered User JustinPSherman's Avatar
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    Originally Posted by Jack612blue View Post
    bump
    I was just taking another look at the problem... are you not given a Cp for the calorimeter? How are you supposed to calculate the heat lost by it if you don't have one? The addy is wearing off so I'm actually taking a logical look at this instead of just trying to shove numbers into the equation.
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  6. #6
    Banned Jack612blue's Avatar
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    Originally Posted by JustinPSherman View Post
    I was just taking another look at the problem... are you not given a Cp for the calorimeter? How are you supposed to calculate the heat lost by it if you don't have one? The addy is wearing off so I'm actually taking a logical look at this instead of just trying to shove numbers into the equation.
    Cp is not given, but Cp formula is total Joules/ Temperature Change.
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  7. #7
    Banned Jack612blue's Avatar
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    I think the problem lies with the with q calorimeter....

    But according to the formula Its Joules/ Delta T * Delta T
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  8. #8
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    Q = m c ΔT

    Heat lost = heat gained

    Find your water equivalent for the ammonium nitrate

    plug dat chit in
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  9. #9
    Registered User JustinPSherman's Avatar
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    Originally Posted by Jack612blue View Post
    Cp is not given, but Cp formula is total Joules/ Temperature Change.
    Originally Posted by Jack612blue View Post
    I think the problem lies with the with q calorimeter....

    But according to the formula Its Joules/ Delta T * Delta T
    which is it brah?
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  10. #10
    I see u mirin jubjub007's Avatar
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    m(of water) c(of water) (Tf-Ti)= m(chemical) c(of chemical) (Tf-Ti)

    you know the mass of water
    you know its specific heat
    you know the initial temp (room temp ~26 C i think)
    you know the final temp because its the same as the final temp of the chemical
    you know the mass of the chemical
    you know the initial and final temp of the chemical

    you dont know the specific heat of the chemical but you know all the other values so plug and chug
    can plug c(of chemical) back into Q = m c ΔT for answer
    youre welcome
    come at me $10

    kinda sleepy but i think thats all right
    *bertstare*
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  11. #11
    Forever cutting Endo. JaffaJune's Avatar
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    we Uk guys yse
    Q=MC(triangle/delta)T

    M=mass of water
    C=specific heat capacity (usually 4.18kj/mol)
    deltaT= temperature change
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  12. #12
    Banned Jack612blue's Avatar
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    Originally Posted by jubjub007 View Post
    m(of water) c(of water) (Tf-Ti)= m(chemical) c(of chemical) (Tf-Ti)

    you know the mass of water
    you know its specific heat
    you know the initial temp (room temp ~26 C i think)
    you know the final temp because its the same as the final temp of the chemical
    you know the mass of the chemical
    you know the initial and final temp of the chemical

    you dont know the specific heat of the chemical but you know all the other values so plug and chug
    can plug c(of chemical) back into Q = m c ΔT for answer
    youre welcome
    come at me $10

    kinda sleepy but i think thats all right
    Nope, gives me 1228.03 Joules, which is wrong.
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  13. #13
    Banned Jack612blue's Avatar
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    bump need some insight brahs...
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  14. #14
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    bump..
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  15. #15
    Banned Jack612blue's Avatar
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