00:01
So in this question, you look at the internal combustion engine.
00:04
Now, basically you have a cylinder, suppose somewhere here.
00:08
One end is closed, and the other end, you have a piston, right? you have some air inside, right? so the piston pushes the air up to maybe this point.
00:27
So that the air, the volume of the air here, is only about 10 % so that's 10 % of its original volume, which is here.
00:37
Okay, so suppose this volume, sorry, this volume is v, and this will be 10 % v, right? now, if we assume that during this process, the air can be sort of taking us ideal gas and in both the initial and final stage, the gas quickly equibrates itself.
00:58
Then we can use the ideal gas state equation, which states that p, the pressure of the gas, times the volume of the gas, and divided by the temperature of the gas, is a constant, right? so using this equation, we can, we see that initially, the p is one atomic, atomic rate it's one atm...