00:01
Hello students, hope you are doing great.
00:03
In this question we are given number of moles of a is equals to 4 mole, number of mole of b is equals to 6 mole, boiling point is given as 85 degree celsius and pressure of a is 500 millimeters of mercury and we have to find out the pressure of b.
00:19
So, we can find out the pressure of b using the raoult's law but here it should be noted that normal boiling point is equals to 85 degree celsius.
00:35
Therefore, vapor pressure of liquid that is mixture of that is the solution of a and b is equals to 1 atm that is equals to 760 millimeters of mercury.
00:53
So, we have to find out the pressure of b.
00:57
So, we need to understand that according to raoult's law, pressure of solution is equals to mole fraction of a into pressure of a plus mole fraction of b into pressure of b.
01:17
So, first of all we will find out the mole fraction of both the species.
01:22
So, mole fraction of a is equals to number of moles of a divided by the sum of number of moles of both the species...