- 1

- 0

**1. Homework Statement**

A submarine has run into trouble and is stuck at the bottom of the ocean. Several people are on board and must make their way to the surface without any diving gear. The air pressure aboard the submarine is 3.36 atm. the air temperature inside the submarine is 18.51 C and you can take the body temp (inside the lungs) to be 36.38 C.

**2. Homework Equations**

A) 1)The first person to leave takes a breath as deep as possible by exhaling as far as possible leaving 1.03 L in their lungs then slowly inhaling to increase their lung volume by 4.98L

If the air temp in submarine was 18.51 C what volume of air is inhaled from surrounding?

2)The person unwisely holds their breath all the way up tp the surface. What would the volume of their lungs be?

B) The 2nd person to leave also takes a breath as deep as possible by exhaling to 1.06L of air left in the lungs and then slowly inhaling to increase their lung volume by 4.92 L, same body temp as above 36.38 C

How many particle of air do their lungs contain after inhaling?

The person breaths out all the way to the surface in order to maintain constant lung volume.How many moles of gas remain in lungs?

C)Given that the molar mass of C02 is 44.0 g/mol what is the root mean square velocity of a C02 molecule in the lungs?

**3. The Attempt at a Solution**

A)

1) I used V=Beta * temp change * initial volume

V = 0.0034 * (273+(36.38-18.51))*1.03

V=1.0186 L

The answer is suppose to be 4.69 L i have tried other formulas like the ideal gas law but cannot come to the same answer

Havent attempted the other questions as i dont know where to start

Would appretaite some help please on what to look at, have looked in a couple of text books and searched the net with no luck

Thank you in advance for any help that can be given