http://www.absolute-scuba.com/double-scuba-tanks/
Combined gas laws question/double checking to see if I may have mixed up where I put volume and temp?
Here is the question- A scuba diver inhales 55.0mL of compressed air from a tank at 3.05 atm of pressure and 9*C. What is the pressure of this air in his lungs at body temp (37*C) if the air expands his lungs by 145.0mL?
Step 1=converting celcius to kelvin 9*C+273=282K 37*C+273=310K
Step 2= P1=3.05atm, V1=55.0mL, T1=282K, P2=?, V2=145.0mL, T2=310K
Step 3= P2=3.05atm x 55.0mL/145.0mL x 310K/282K=1.27 atm
My question is if my placement of the V1 V2 T1 and T2 are in the correct places or if I may have gotten the wrong answer because they should be switched up differently.
I agree with you.
Here’s my working, just in case you wanted to check.
P1V1 / T1 = P2V2 / T2
P2V2 = (P1V1 / T1) x T2
P2 = (P1V1 / T1) x T2) / V2
P 2 = ((3.05 atm x 55.0 ml / 282.15 K) x 310.15 K) / 145.0 ml
P2 = 1.27 atm
Technical Diving: How to Assemble Double Tanks by Dive Rite
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