1. Not finding help here? Sign up for a free 30min 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!

Thermal physics: work and heat

  1. Feb 10, 2008 #1
    1. The problem statement, all variables and given/known data

    A cup containing 200 grams of H20 is siting on your dining room table . After carefully measuring its temperature to be 20 degree celsuis , y ou leave the room. Returning ten minutes later, you meaure its temperature again and find that it is now 25 degree celsuis. What can you conclude about the amount of heat added to water?(hint: this is a trick question)
    2. Relevant equations

    3. The attempt at a solution

    My response to this question was that there is no heat added or heat is equal to zero since heat is a spontaneous process where heat flows from a hot object to a cold object. Even though there is a temperature difference involved in this process, The temperature increases rather than decreases
  2. jcsd
  3. Feb 11, 2008 #2

    Shooting Star

    User Avatar
    Homework Helper

    I would be very much interested to know from where to where the heat flowed in this case, since you've tantalizingly left out that part.
    Last edited: Feb 11, 2008
  4. Feb 11, 2008 #3


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Is it in the sun?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Thermal physics: work and heat
  1. Thermal Physics - heat (Replies: 1)

  2. Thermal physics (Replies: 1)

  3. Thermal Physics (Replies: 3)

  4. Thermal Physics (Replies: 3)