Chemistry - Chapter 14 Flashcards
Define an Ideal Gas
it’s an imaginary gas that follows the five assumptions
Define a Real Gas
an actual gas; its behavior deviates most from an ideal gas at HIGH pressures and LOW temperatures
What is gas pressure a result of?
Of gas particles colliding with surfaces
Atmospheric Pressure is a result of…?
when is there less pressure?
A result of the gases in the atmosphere
there is less pressure at higher altitudes
What does STP stand for?
Standard Temperature and Pressure
what is the standard temperature?
O°C or 273°K
what is the standard pressure?
1 atm or 760mm Hg (torr)
What is the relationship in Boyle’s law?
Pressure and Volume = INVERSELY related
What is the relationship in Charles’s Law?
Temperature and Volume = DIRECTLY related
What is the relationship in Gay-Lussac’s Law?
Pressure and Temperature = DIRECTLY related
What is Dalton’s Law?
P[total] = P[1] + P[2] + … + P[n]
Combined Gas Law (3)
- Combines all three gas laws into one
(P[1]V[1]) / (T[1]) = (P[2]V[2]) / (T[2])
- must use absolute temperature scale (kelvin) –> °C + 273 = °K
what equation is used to bring together gas properties?
3
PV = nRT
R = 8.31
it can be derived from experiment and theory
must use kelvin scale on which gas law(s)? (2)
- combined gas law
- ideal gas law
define diffusion
the gradual mixing of molecules of different gases
