00:01
In the question we are given that there is a cylinder piston, cylinder piston for which we are given the mass that is m is equal to 0 .9 kg, 0 .9 kg.
00:14
Similarly, the temperature that is 1 temperature, number 1 is given to us as 300 kelvin and p1 that is the pressure at which it is, it is given as 100 kilo pascal.
00:26
Then we are given with temperature 2 that when the air is compressed.
00:31
After the compression we are given t2 is equal to 470 kelvin and the pressure is given as 600 kilo pascal.
00:44
At the end we are given that the heat transfer that is q is equal to minus 20 kilo joules.
00:54
This is the value given.
00:55
Now, we need to determine the work done using the ideal gas model, the ideal gas model for air and the first law of thermodynamics.
01:07
So using these we know that from an ideal gas, ideal gas air table at air table at t at t1 equals to 300 kelvin.
01:23
The value for u1 is equals to 214 .07 kilo joule per kilogram.
01:32
Similarly, at t2 that is equal to 470 kelvin, this value changes to u2 that is equal to 337 .32 kilo joules per kilogram.
01:46
Now this we have both the values of u1 and u2.
01:49
So to find the difference that would be delta u will be equal to m into u2 minus u1.
01:55
Now substitute the values.
01:59
Substituting, substituting the values we have the values...