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: High School Physics Competition: Change in Entropy

  1. Sep 29, 2013 #1
    During a physics competition, I came across this question.
    My work was
    [itex]\begin{align*}\Delta S &= \frac{Q}{T} \\ \Delta S &= \frac{1.25 \times 10^3 \, \mathrm{J}}{348 \, \mathrm{K}} \\ \Delta S &= 3.59 \,\,\mathrm{\left( J/K\right )} \end{align*}[/itex]

    but I was stuck in between two answer choices

    c) + 3.59 J/K
    d) # 3.59 J/K

    I had no idea what the hashtag meant, so I skipped it. Can someone clear this up for me?
  2. jcsd
  3. Sep 29, 2013 #2
    Honestly I have no idea, but certainly the change in entropy is positive, so answer c) is correct. Maybe it's a misprint?
  4. Sep 30, 2013 #3
    I guess what dipole said it's right 'cause it sometimes happens
    Last edited: Sep 30, 2013
  5. Oct 1, 2013 #4
    For anyone who was wondering, the hashtag just meant "negative". Thank you dipole.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted