Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Some conceptual chemistry questions

  1. Oct 16, 2014 #1
    Hello! I have a few conceptual questions regarding thermochemistry.

    In thermochemistry, why is Q of solution equal to negative Q of reaction?
    Why is a volume decrease equal a POSITIVE value for w?
  2. jcsd
  3. Oct 17, 2014 #2

    Simon Bridge

    User Avatar
    Science Advisor
    Homework Helper

    You should be able to answer those questions yourself from a consideration of which quantities the letters in question represent and where those quantities come from - the properties that the relations are illustrating.

    i.e. if a solution heats up, where did the heat energy come from?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook