1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Thermodynamics, heat in a copper cube transfer to water

  1. Mar 27, 2010 #1
    1. The problem statement, all variables and given/known data

    When a copper cube of side of 2.0 cm is immersed into a perfectly insulated container filled with 1.0 kg of water at 5 degree celcius , the temperature of water rises to 7 degree celcius . Assuming that no heat is lost to the surrounding , calculate the original temperature of the cube .

    Given density of copper = 8900 kg / m^3 , specific heat capacity of water = 4180 J/kg/K and specific heat capacity of copper = 385 J/kg/K

    2. Relevant equations

    3. The attempt at a solution

    from Q=mc theta = 1(4180)(2) = 8360 J and this is the heat supplied to the water

    mass of copper = (8900)(8 x 10^(-6)) = 0.0712 kg

    8360=0.0712(385) d theta

    d theta = 305 degree celcius but this is the change in temperature , how do i find the original temperature from there .
  2. jcsd
  3. Mar 27, 2010 #2


    User Avatar
    Homework Helper

    Re: thermodynamics

    Final temperature of the mixture is 7 degrees
    Change in temperature = Original temperature of the copper - final temperature of the mixture.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Thermodynamics heat copper Date
Molar latent heat of phosphine Oct 22, 2017
Minimum work needed to compensate for a heat leak Oct 13, 2017
Moving along an isothermal Aug 14, 2017
How much water is converted to ice? Aug 13, 2017