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CBSE Class 11-science Answered

A mixture if thane and ethene occupies 41 L at 1 atm and 500K. The mixture reacts completely with 10/3 mole of O2 to produce CO2 and H2O.The mole fraction of ethane and ethene in mixture are (R-0.082 Latm /K mol) respectively (a)0.50,0.50 (b)0.75,0.25 (c)0.67,0.33 (d)0.25,0.75 (e)0.33,0.67  
Asked by Balbir | 09 Jul, 2019, 09:47: PM
answered-by-expert Expert Answer
Suppose moles of ethane =n1
moles of ethene=n2
Total number of moles=n
PV equals nRT
1 cross times 41 equals straight n cross times 0.0821 cross times 500
straight n equals 1
straight n subscript 1 plus straight n subscript 2 equals 1 space........ left parenthesis 1 right parenthesis
straight C subscript 2 straight H subscript 6 plus space 7 over 2 straight O subscript 2 rightwards arrow 2 CO subscript 2 plus 3 straight H subscript 2 straight O
straight C subscript 2 straight H subscript 4 space plus 3 straight O subscript 2 rightwards arrow 2 CO subscript 2 plus 2 straight H subscript 2 straight O
7 over 2 straight n subscript 1 plus 3 straight n subscript 2 equals 10 over 3
straight n subscript 1 equals 2 over 3 space comma space space space straight n subscript 2 equals 1 third
straight X subscript 1 equals 2 over 3 equals 0.67
straight X subscript 2 equals 1 third equals 0.33
Answered by Ravi | 10 Jul, 2019, 10:54: AM
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