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Question

3. A SCUBA diver fills a balloon under water. He measures the volume to be 1.1 liters and the absolute pressure the be 4.0 atmosphere (atm) and the temperature to be 76•F (24.4•C). In 10 seconds it reaches the surface where absolute pressure is 1.0 atmosphere and surface temperature is 84•F (29.9•C) 
- 3A - which has law would be used to determine the unknown?

- 3B - what temperatures should be used?

- 3C - solve for the unknown( the final ballon volume)

Answer choices 
3A. A. Boyle's law 
B. Charles' law 
C. combined gas law

3B. A. T1=76 degrees F, T2=88 degrees F 
B. T1=24.4 degrees C, T2=28.9 degrees C 
C. T1=297.4K, T2=302.9K
D. T1=302.9K, T2= 297.4K

3C. A. 44L
B. 0.4L
C. 6.1 L
D. 4.5 L

donpat · Answer

Apply the Combined Ideal Gas Equation :
-------------------------------------------------------

3A.  Answer  =  C. Combined gas Law <--------[ 3A ]------

3b. Answer  =  D.  302.9 K and 297.4 K <------[ 3B ]------

( P2 ) ( V2 ) / ( T2 )  =  ( P1 ) ( V1 ) / ( T1 )

V2  =  ( V1 ) ( P1/P2 ) ( T2 / T1 )

V2  =  ( 1.1 L ) ( 4.0 atm / 1.0 atm ) ( 29.9 + 273 K /  24.4 + 273 K )

V2  =  ( 1.1 L ) ( 4.0 atm / 1.0 atm ) ( 302.9 K / 297.4 K )

V2  =  4.5 L <-----------[ 3C ---> Answer D ]-----------------------

Excellent problem !!!

physics help?

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