Physics Flashcards
what is the type of weaker force that liquid molecules exert BETWEEN/ON each other
van der waals forces
what is the pressure exerted by a vapor when, at any one temperature, an equilibrium is reached at which the same number of molecules are vaporizing as are returning to liquid
saturated vapor pressure
only within a closed container**
The temperature at which vapor pressure becomes equal to atmospheric pressure and at which all liquid changes to gas phase
boiling point
The higher the boiling point, the greater the chance it will be ___?
liquid
it takes longer to reach a gas phase
how are saturated vapor pressure and boiling point related?
inversely
The lower the boiling point, the higher the vapor pressure.
as temperature rises, does vapor pressure increase or decrease
increase
(think, boiling point decreases the hotter it gets)
Is vapor pressure a function of volume, temperature or pressure?
temperature
what is the equation for force? newton’s second law?
Force= mass x acceleration (F=ma)
what is the force applied over a surface
pressure
what is the equation for pressure
Pressure=force/area
what is the pressure of 1 newton acting over 1 square meter – N/m2
pascal (Pa)
however, kPa is usually used
what is atmospheric pressure (ATM) in bar?
1 bar
what is atmospheric pressure (ATM) in kPa?
100
what is atmospheric pressure (ATM) in mmHg?
760
what is atmospheric pressure (ATM) in cmH2O?
1034
what is atmospheric pressure (ATM) in psi?
14.7
what is 1kPa in mmHg?
7.5*****
what is 1kPa in cmH2O?
10.34
what is 1kPa in psi
0.147
what is gauge pressure + atmospheric pressure
absolute pressure
when an oxygen tank is empty and reads “0” is it 0 gauge pressure or 0 atmospheric pressure*
0 gauge pressure
(if pressure was truly 0, it would be collapsed)
the cylinder actually contains O2 at atmospheric pressure or 14.7 psi or 1 bar
what are gas-cylinder pressures, art line pressures, ventilator pressures such as peak inspiratory pressures?
gauge pressures
what is the pneumonic for the gas laws
Prince Charles (pressure) had TB (boyle’s temp) and was given Vitamin G (Volume, Gay Lussac’s)
what is the law:
At a constant temperature, the volume of a given gas varies inversely with the absolute pressure.
boyle’s law of temperature
P1 x V1 = P2 x V2