Ideal Gas HW: Volume of Bubble Rising to Surface

[whozum]

Normal pressure + Pressure of the water above, which is Force * Depth

 

[KingNothing]

So where does density come in? It'd be easiest just to give me your number for pressure, I am trying to show another way of doing this.

 

[whozum]

((1.013*10^5)+(1025*9.8*80.0)) is the density he reported in pascals

 

[osskall]

Using the pressure formula, the $$P_f$$ will be far higher than the $$P_i$$, meaning the final answer for $$V_f$$ will be very low (dividing a small # by a very large #). This doesn't make sense though since the volume should increase as the bubble rises to the surface under decreasing pressure.

You first state that $$P_f >>P_i$$ and then you go on saying that the pressure is decreasing. Which statement is the true one?