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    Yusf's Avatar
    Yusf Posts: 197, Reputation: 3
    Junior Member
     
    #1

    Oct 17, 2016, 02:38 AM
    Don't know how to use this formula for entropy of mixing.
    Please take a look at the question I have attached here. For this, I found a wiki article for this formula that I have also attached here. However I found it complicated and didn't understand a word in the section I have drawn a rectangle over and underlined in light grey .
    Please help me to solve this question..
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    ebaines's Avatar
    ebaines Posts: 12,132, Reputation: 1307
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    #2

    Oct 17, 2016, 07:15 AM
    Where are you having difficulty? The mole fraction of He is 2/5, and the mole fraction of O2 is 3/5, so the equation becomes:

    Yusf's Avatar
    Yusf Posts: 197, Reputation: 3
    Junior Member
     
    #3

    Oct 17, 2016, 10:17 AM
    He he he... I guess I got confused by the complex notations in wiki. Thanks for making it clear.

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