A small bubble rises from the bottom of a lake, where the temperature and pressu

Chemistry
Tutor: None Selected Time limit: 1 Day

  1. A small bubble rises from the bottom of a lake, where the temperature and pressure are 4°C and 3.0 atm, to the water's surface, where the temperature is 25°C and the pressure is 0.95 atm. Calculate the final volume of the bubble if its initial volume was 2.1 mL. 
May 5th, 2015


  • For this problem, we can use the equation 

    To solve for final volume, we can algebraically maipulate the equation to be 

    We're calculating the change in volume from the bottom of a lake to the surface, so our initial values will be the ones given for the bubble when it is at the bottom.

    Initial pressure: 3.0 atm

    Initial volume: 2.1mL

    Initial temperature: 4oC (277K)

    Our temperature needs to be in Kelvin, so we add 273 to 4 to get 277K.

    Final pressure: 0.95 atm

    Final volume: Unknown

    Final temperature: 25oC + 273 = 298K

    Now plug the values into the equation:

    Our answer is expressed to two significant figures since we were limited to that accuracy by the values 3.0, 2.1, and 0.95.


May 5th, 2015

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