1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Specific Heat of Metals/Homework Help?

  1. Apr 20, 2006 #1
    Here is a homework problem I am working on:

    1. Suppose 50 cm^3 of water at 85 degrees C is addedto 100 cm^3 of water at 10 degrees C. What is the equilibrium temperature of the mixture, assuming there is no heat lost to the environment?

    * = multiplied by
    T = Temperature of water
    m = mass of water
    c = specific heat of water = 4184 J

    T= {(m * c * T) + (m * c * T)} all that divided by {(m * c + m * c)}

    which gives me the following:

    {(50 * 4184 * 85) + (100 * 4184 * 10)}
    ------------divided by---------------
    {(50 * 4184) + (100 * 4184)}

    = 35 degrees C for equilibrium temperature

    Is this correct? Did I set it up and do it the right way??

    Appreciate your help on this :) THANKS!!
  2. jcsd
  3. Apr 20, 2006 #2


    User Avatar

    Staff: Mentor

    Is the temperature supposed to be in C or K? (I honestly don't know, since I don't work with this type of problem, but it seems like absolute temperature might be needed for the calculation of the combined average, and then convert back to C.)
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook