[dtownsen]

Is there a difference in volume of a full breath of air taken at 1 atm compared to a full breath taken at 2 atm?
Is there a difference in the amount of gas(moles) in a full breath taken at 1 atm compared to a full breath taken at 2 atm?

[Borek]

And your opinion is? I know the answer, but giving it wont help you understand whats and whys.

[dtownsen]

i mean i think there would be difference in volume because of pressure. okay a full breath of air at 1 atm will have a lessor volume than if it were taken at 2 atm....how would i know the amount of gas?

[dtownsen]

because the pressure increases its harder to breath so the volumes would vary due to that right?

[Borek]

Why do you think it is harder to breath at 2 atm?

Does the volume of lungs change with pressure?

[dtownsen]

I think it's harder to breath at 2 atm because the pressure is higher.i dont know if the volume of lungs change but i know that when pressure increases volume decreases because they are directly proportional.

[Borek]

What is pressure inside lungs when you breath and the pressure outside is 2 atm?

Is breathing using compreesed air in scuba diving harder, or not?

i know that when pressure increases volume decreases

You are right with this increase/decrease thing.

because they are directly proportional.

No - they are inversely proportional.

However, this increase/decrease applies only to the situation when the container is sealed and amount of gas doesn't change. Lungs are open to the atmosphere.

[dtownsen]

What is pressure inside lungs when you breath and the pressure outside is 2 atm?
idk...2 ATM because thats what surrounds you


Is breathing using compreesed air in scuba diving harder, or not
i think that it would be harder because of the pressure in the water

[Borek]

What is pressure inside lungs when you breath and the pressure outside is 2 atm?

idk...2 ATM because thats what surrounds you

Right - 2 atm. So it is the same pressure as the one outside. If the pressures are identical, there is no reason for breathing to be more difficult.

Is breathing using compreesed air in scuba diving harder, or not

i think that it would be harder because of the pressure in the water

It is not. Scuba pressure regulator is made in such a way, that it supplies you with the air of the same pressure than water around you has. That's why you can breath.

Imagine you have huge tank and inside of this tank there is 1L jar without lid. When the air in the tank is at 1 atm - what is volume of the air in the jar? Now we incerase pressure in the tank to 2 atm. What is volume of the air in jar now?

Back to your lungs - imagine yourself in the same place the jar was before Is there any change in the volume of your lungs when the pressure rises?