00:01
In this question we have given a pv diagram of the process that is a b c and we have to find the temperature of the gas at point a b and c so first of all i'm doing the given pv diagram for this tuition so this is our pressure axis and this is volume axis and this is the process a b and this is the process from b to c so this is a this is b and this is c we have given the volume at point a and that is 0 .01 and at b the volume is this is 0 .07 meter cube and the pressure at this point is 2 atmospheric and this point the pressure is 8 so this is our pressure axis this is our volume axis so first of all we have given the number of moles that is n is equal to 0 .45 moles now we have to find the temperature at point a b and c so we can say that from ideal gas equation or from gas equation that is pv is equals to nrt.
01:16
Now from here we get the value of temperature so this will come out to be pv divides by nr.
01:23
So in the first part of the problem the temperature at state a is given by that is pressure at a into volume at a upon n into r.
01:34
Now put all the data in this equation.
01:36
So this is 2 into 10 to the temperature.
01:38
Power 5 into this is 0 .01 upon 0 .45 into this is 8 .315 after solving this we get this is 535 kelvin so this is the temperature at a similarly we can find the temperature at state b and this is given by p b into vb upon this is n into r now put all the data in this equation so pressure at this is 5 into 10 to the power 5 into this is 0 .07 upon 0 .45 into 8 .315 and after solving this we get this is 9 350 kelvin.
02:18
Now temperature at c is given by this is pressure at c into volume at c upon this is n into r so this is 8 into 10 to the power 5 into 0 .07 upon 0 .45 into this is 8 .35 into this is 8 .315 and this will come out to be 15 ,000 kelvin.
02:40
So this is the temperature at state c.
02:43
This is temperature at b and this is temperature at a.
02:52
Now in the second part of the problem, we have to find the work done by or on the gas in this process...