Question

A scuba tank initially has a pressure of 180 atm at 20◦ C. The volume of the tank is 11.3 L.

(a) What volume of container (in liters) would be required to store the gas at 1.00 atm at the same temperature?

(b) Before entering the water, a person consumes 2.0 L of air in each breath, and breaths 12 times a minute. At this rate, how long would the tank last?

(c) At a depth of 20.0 m, the pressure is approximately 3 atm and the temperature is 10◦ C. How long would the same tank last assuming the breathing rate (2.0 L/breath) does not change?

Answer #1

At rest, the average person breathes 0.5 liters (0.017 ft3)
approximately 12-20 per minute. If you were to breath 0.5 liters
per breath at a rate of 20 breaths per minute, calculate how long a
completely full 80 ft3 scuba tank would last at the following
depths – 10 m, 20 m, 30 m, 40 m. Technical divers can also breath
mixed gasses to depths below 100 m. Using the same breathing volume
and rate, calculate how long it would...

A compressed air tank carriedby scuba divers has a volume of
8.0L and a pressure of 140atm at 20 degrees celsius. What is the
volume of air in the tank in liters at STP?

A scuba diver takes a 2.8 L balloon from the surface,
where the pressure is 1.0 atm and the temperature is 34 C, to a
depth of 25 m, where the pressure is 3.5 atm and the temperature is
18 C. What is the volume of the balloon at this depth?

2. An aluminum scuba tank, which has an internal volume of 11.1
L, is filled with air to a pressure of 3000 psi when at room
temperature (i.e. 20.0 OC). A diver takes the tank into seawater,
where the water temperature is 46 degrees Fahrenheit (i.e. 8.00OC).
To what pressure does the air in the tank drop? (The thermal
coefficient of expansion for aluminum is 24.0x10-6 OC -1 .)
Answer: 2880 psi
Please show steps and pictures!

4. The diver in Problem 2, while underwater at a depth of 20.0
m, breathes from the tank so that the air entering the diver’s
lungs is at the same pressure as that of the surrounding water. If
each breath fills the diver’s lungs to a volume of 3.70 L, and the
air he breathes warms to a temperature of 30.0OC, how many breaths
can the diver take before the air remaining in the tank drops to a
pressure of...

2. An aluminum scuba tank, which has an internal volume of 11.1
L, is filled with air to a pressure of 3000 psi when at room
temperature (i.e. 20.0 OC). A diver takes the tank into seawater,
where the water temperature is 46 degrees Fahrenheit (i.e. 8.00OC).
To what pressure does the air in the tank drop? (The thermal
coefficient of expansion for aluminum is 24.0x10-6 OC -1 .)
Answer: 2880 psi
Don't need #2, just #3 please.
3. For...

A scuba diver takes a tank of air on a deep dive. The tank's
volume is 10 L and it is completely filled with air at an absolute
pressure of 237 atm at the start of the dive. The air temperature
at the surface is 85 ?F and the diver ends up in deep water at 60
?F.
Assuming thermal equilibrium and neglecting air loss, determine
the absolute internal pressure of the air when it is cold.

1) At standard temperature and pressure (0 ∘C and 1.00 atm ),
1.00 mol of an ideal gas occupies a volume of 22.4 L. What volume
would the same amount of gas occupy at the same pressure and 45 ∘C
?
Express your answer with the appropriate units.
2) One mole of an ideal gas is sealed in a 22.4-L container at a
pressure of 1 atm and a temperature of 273 K. The temperature is
then increased to 304...

As a scuba diver descends under water, the pressure increases.
At a total air pressure of 2.94 atm and a temperature of 25.0 ∘C,
what is the solubility of N2 in a diver's blood? [Use the value of
the Henry's law constant k calculated in Part A,
6.26×10−4mol/(L⋅atm).]
Assume that the composition of the air in the tank is the same
as on land and that all of the dissolved nitrogen remains in the
blood.

A 5.0 mol sample of gas exerts a pressure of 2.0 atm at 27 C in
a certain container. What would be the pressure inside this
container if 2.5 mol of the same gas are present at a temperature
of 100 C?

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