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# Ch3 Gas Laws - HCCRT

Boyles Law? If temperature remains constant, pressure will vary inversely to volume.
Charles' Law? If pressure remains constant, volume and temperature will vary directly.
Gay-Lussac's Law? If the volume remains constant, pressure and temperature will vary directly. If you increase the pressure in a system it will tend to get hotter. Also, if you increase the pressure within a closed container, the temperature will increase.
Ideal Gas Law? Incorporates pressure, volume and temperature in a mathematical equation.
Dalton's Law? In a mixture of different gases, the total pressure is equal to the sum of the partial pressures of all these various gases. Ex. Alveolar Air Equation PAO2= [(PB-PH20)x Fi02]-PaCO2x1.25 Assuming PAO2=PaCO2
Fick's Law? The rate of gas transfer across a sheet of tissue is directly proportional to the surface area of the tissue & to the difference of the partial pressures of the gas between the two sides of the tissue & is inversely proportional to the thickness of tissue
Henry's Law? The amount of gas that DISSOLVES ina liquid at a given temperature is proportional to the partial pressure of the gas. The amount of gas that can be dissolved by 1 ml of a given liquid at standard pressure (760 mmHG)is known as the solubility coefficient.
Graham's Law? The rate of DIFFUSION of a gas through a liquid is 1) directly proportional to the solubility of the gas 2) Inversely proportional to the gram molecular weight. Oxygen is lighter, therefore it moves faster than CO2
Absolute Humidity the actual amount of water vapor in a gas (ml/L)
Relative Humidity the actual amount of water vapor in a gas compared with the amount necessary to cause the gas to be fully saturated (%)
Body Humidity The absolute humidity of inspired gas saturated at body temperature
Humidity deficit The difference (mg/L) between the water vapor content of a gas at BTPS (fully saturated air at normal body temperature and pressure) BTPS=Body Temperature Saturated
Created by: sweetpea15kp