The following table gives the mole fraction of methylbenzene(A) in liquid and ga

Question

The following table gives the mole fraction of methylbenzene(A) in liquid and gaseous mixtures with butanone at equilibrium at303.15K and the total pressure p. Take the vapour to be perfect andcalculate the partial pressures of the two components. Plot themagainst their respective mole fractions in the liquid mixture andfind the Henry's law constants for the two components. xA        0      0.0898      0.2476      0.3577      0.5194      0.6036 yA      0      0.0410      0.1154      0.1762      0.2772      0.3393 p/kPa 36.066   34.121   30.900   28.626   25.239   23.402    xA      0.7188   0.8019   0.9105   1 yA      0.4450   0.5435   0.7284   1 p/kPa   20.6984   18.592   15.496   12.295 The following table gives the mole fraction of methylbenzene(A) in liquid and gaseous mixtures with butanone at equilibrium at303.15K and the total pressure p. Take the vapour to be perfect andcalculate the partial pressures of the two components. Plot themagainst their respective mole fractions in the liquid mixture andfind the Henry's law constants for the two components. xA        0      0.0898      0.2476      0.3577      0.5194      0.6036 yA      0      0.0410      0.1154      0.1762      0.2772      0.3393 p/kPa 36.066   34.121   30.900   28.626   25.239   23.402    xA      0.7188   0.8019   0.9105   1 yA      0.4450   0.5435   0.7284   1 p/kPa   20.6984   18.592   15.496   12.295

Explanation / Answer

plot the partial vapour pressures against their mole fractions. then draw a straight line tangent to the point at a vapour pressure with lowest mole fraction. kA= 15.58 kPa & kB=47.03kPa

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