Gas Exchange

Question 1

What is the general gas law?

Answer 1

PV = nRT

P = pressure
V = volume
n = moles
R = Gas constant
T = temperature

Question 2

How do you convert gas volume in gas phase to gas volume in liquid phase?

Answer 2

volume at BTPS x 273/310 x PB -47/760

Question 3

What is Boyle’s law?

Answer 3

P1V1 = P2V2

For a given temp the product of pressure and volume is constant.

Question 4

What is Dalton’s Law of partial pressures?

Answer 4

P = PB x F

P = partial pressure
PB = Barometric pressure
F = fractional concentration of the gas

Question 5

What it Dalton’s law for humidified gas?

Answer 5

P = (PB - PH2O) x F

P = partial pressure
PB = barometric pressure
PH2O = Water vapor pressure at 37 degrees (47mmHg)
F = fractional concentration of the gas

Question 6

What is Henry’s Law?

Answer 6

C = P x Solubility

C = concentration of dissolved gas
P = partial pressure of gas
Solubility = solubility of gas in solution.

Question 7

What is Fick’s Law?

Answer 7

V = [D(A)P] / X

V = Volume of gas transferred per unit of time
D = Diffusion coefficient of the gas
A = Surface area
P = Partial pressure difference of the gas
X = Thickness of the membrane