Of course in the reversible case, you're always pushing against an external pressure, which is essentially equal to the internal pressure.
当然在可逆的情况下,外压力,总是,等于内部压力。
Let's imagine maybe instead we just immediately dropped the pressure let the system expand against the lower pressure.
现在假设,我们很快地降低压力,让系统在低的外压力下膨胀。
So the expansion against lower pressure draws less heat from the hot reservoir right.
所以压强较低时的膨胀,从高温热源吸收的热量更少。
Pressure is when you have one of these hard spheres colliding against the wall.
这是一个小球,它与墙发生碰撞。
It's not pressing against as much pressure.
要小些。
This is the pressure that you're applying against the piston, not the pressure of the gas.
最后等于Pext乘以体积,面积乘以距离得到体积。
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