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CBSE Class 12-science Answered

pentane and heptene have a vapour pressure of 55pa and 4.8 respectively at 20oc. A mixture is known to contahoeptin 2.52g of pentane and 1400g of heptene.calculate a.the mole fraction of each components in the liquid b.the total vapour pressure of the mixture. c.the mole fraction of each component of the vapour phase
Asked by jenniferohwo | 03 Sep, 2019, 07:33: AM
Expert Answer
(1)  Mole Fraction of Heptane in liquid =XH
      Mole Fraction of Pentane in liquid=XP
straight X subscript straight P equals fraction numerator straight n subscript straight P over denominator straight n subscript straight P space end subscript space plus space straight n subscript straight H end fraction straight X subscript straight P equals fraction numerator begin display style fraction numerator 2.52 over denominator 72.15 end fraction end style over denominator begin display style fraction numerator 2.52 over denominator 72.15 end fraction plus fraction numerator 1400 over denominator 98.186 end fraction end style end fraction straight X subscript straight P space equals fraction numerator 0.03492 over denominator 0.03492 plus 14.258 end fraction space space space space space space space space space space space equals fraction numerator 0.03492 over denominator 14.2929 end fraction space space space space space space equals 0.00244317 straight X subscript straight H equals 1 minus 0.00244317 space space space space space equals 0.9975 left parenthesis 2 right parenthesis space P subscript T space equals space P subscript H to the power of o space X subscript H plus P subscript P to the power of o space X subscript P space space space space space space space P subscript T space equals 4.8 cross times 0.9975 plus space 55 cross times 0.03492 space space space space space space space space space space space space equals space 4.788 plus 1.9206 space space space space space space space space space space space space equals 6.7086 space Pa left parenthesis 3 right parenthesis space Mole space Fraction space of space Heptane space in space vapour space state space left parenthesis Dalton apostrophe straight s space law right parenthesis space space space space space space space space space space space space equals fraction numerator 0.9975 cross times 4.8 over denominator 6.7086 end fraction space space space space space space space space space space space space equals 0.7143 space space space Mole space fraction space of space space Pentane space in space vapour space state equals fraction numerator 55 cross times 0.03492 space space space over denominator 6.7086 end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals fraction numerator 1.9206 over denominator 6.7086 end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 0.286 space space space space space space space space space space space space space space space space space space space space
Answered by Ravi | 03 Sep, 2019, 05:45: PM

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