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!

Entropy question

  1. Feb 9, 2004 #1
    How many possible arrangements are there for a deck of 52 playing cards? ( For simplicity, consider only the order of the cards, not whether they are turned upside down)

    Answer: Since there are 52 cards, each card has 52 possiblilites so 52*52=2,704. is this right?

    Suppose you start with a sorted deck and shuffle it repeatly, so that all arrangements become accessible. How much entropy do you create in the process? Express answer as pure number (neglecting the factor k) and the SI units.


    Stotal=k ln omega(total)= ln(2,704)=7.902
    7.902 is the amount of entropy created.

    Is this entropy significat compared to the entropy associated with arranging thermal energy among the molecules in the cards?

    answer: I don't know?
  2. jcsd
  3. Feb 9, 2004 #2
    Not knowing much about entropy I can't answer your complete question, but I can say that there are 52! (that's 52*51*50*49*....* 3*2*1) distinct permutations of your cards (assuming no trickery with orientation) not 52*52:
    You can see it pretty easily with 4 items (I'd do three but that's a little too trivial):

    Notice how there are 4 cols? And in each column there are 3! ways of arranging the last three numbers? That's where the 4*3*2*1 comes from.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Entropy question
  1. Entropy Question (Replies: 2)

  2. Entropy question (Replies: 1)