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Homework Help: Need help on energy equasions please

  1. Nov 7, 2007 #1
    Need help on energy equasions please!!

    1. The problem statement, all variables and given/known data
    I need help on this homework question please i dont know how to solve it


    2. Relevant equations
    how many calories of heat are released by 25 g of water as it drops in temperature from 77 degrees c to 50 degrees c ( 1 cal= 4.18)


    3. The attempt at a solution

    I dont know which equasion i should use
    Q= cmDeltaT ?
     
  2. jcsd
  3. Nov 7, 2007 #2

    Chi Meson

    User Avatar
    Science Advisor
    Homework Helper

    try it.
     
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