By measuring the equilibrium between liquid and vapor phases of a binary solution at 30°C at 1atm, it was found that xA=0.220 when yA=0.314. Calculate the activities and activity coefficients of both components in the solution. The vapor pressures of the pure components at this temperature are 73kPa and 92.1kPa.

Explanation:

From the knowledge of liquid and vapor phases

is the mole fraction in the liquid

is the mole fraction in the vapor

Given that :

= 0.314

using the formula:

To calculate the activities and activity coefficients of both components in the solution; we have:

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

c (diamond),

sio2 (quartz)