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  • 11-12-2013 5:51pm
    #1
    Ursus articus
    Registered Users, Registered Users 2 Posts: 65 ✭✭


    hi im getting muddled up with this problem just hoping someone can help me?

    When two materials are combined, (e.g. water and copper), the amount of energy lost by one is equal to the
    amount of energy gained by the other.
    If 2.34 kg of Aluminium at 112 C mixes with 9.98 kg of water at 2.0 C
    find the final temperature.

    Given that: Specific heat of water is 4186J kg-1
    K
    -1
    ; Specific heat of Aluminium is 900J kg-1
    K
    -1


Comments

  • #2
    citrus burst
    Registered Users, Registered Users 2 Posts: 147 ✭✭citrus burst


    What exactly are you stuck on?


  • #3
    Ursus articus
    Registered Users, Registered Users 2 Posts: 65 ✭✭Ursus articus


    Ive worked the problem out a a few times I think my method is wrong! I keep getting negative answers


  • #4
    Carawaystick
    Registered Users, Registered Users 2 Posts: 8,779 ✭✭✭Carawaystick


    Ursus articus wrote: »
    Ive worked the problem out a a few times I think my method is wrong! I keep getting negative answers

    energy lost is negative.


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