# Shared Flashcard Set

## Details

c/p test 2 part 1
pressure, flow, boiling point, vaporization, heat, temp and energy
58
Chemistry
02/15/2012

Term
 force
Definition
 an influence on an object with mass that results in a change in velocity of the mass.
Term
 work
Definition
 force acting over a distance
Term
 energy
Definition
 measure of the amount of work done, in a sense same as work
Term
 newtons, dynes, joules
Definition
 measure of force
Term
 dyne
Definition
 force that will accelerate 1gm/1m/sec
Term
 joule
Definition
 work done by force of 1 newton
Term
 velocity
Definition
 distance traveled per unit time
Term
 kinetic energy (KE)
Definition
 inherent energy in motion of a bodymass x (velocity squared)/ 2as velocity and mass increase this increases
Term
 pressure
Definition
 force exerted by atoms and moleculesforce/area
Term
 density effect
Definition
 increase in density= increase pressure
Term
 resistance
Definition
 passive force exerted in opposition to another and active force.
Term
 friction
Definition
 resistance to flow in a tube caused by adhesive and cohesive forces
Term
 viscosity
Definition
 measure of fluids internal resistance to flow, increases with increasing intermolecular forces
Term
 pressure in regards to flow
Definition
 change in pressure= flow x resistance
Term
 pascal's law
Definition
 an external pressure is applied to a confined fluid the pressure is transmitted unchanged to every point within the fluid (hydraulic system)
Term
 atmospheric pressure
Definition
 total force of gas on the earth's surface
Term
 ambient pressure
Definition
 pressure surrounding the organism, could be anywhere
Term
 torr
Definition
 unit of pressure to support 1mm column at Hg at 0 degrees Celcius,
Term
 partial pressure
Definition
 pressure exerted by a single component gas of a mixture of gases.
Term
 Partial pressure of oxygen at sea level
Definition
 .21 x 760= 160 mmHg
Term
 critical pressure
Definition
 min pressure necessary to liquefy gas at its critical temperature
Term
 critical temperature
Definition
 Temp above which a gas can not be liquefied regardless of amount of pressure applied
Term
 poiseuilles law
Definition
 relates volume of flow through a tube:pie x r (4th power) change P/8 n Llooks at diameter, pressure differential, length and viscosityl=length, n=viscosity
Term
 graham's law
Definition
 relates flow through an orifice1/square root MW
Term
 laminar flow
Definition
 flow = 1/viscosityinversely proportional to viscositymore compressed diameter the faster the flow
Term
 turbulent flow
Definition
 1/ square root densityinversely proportional to density
Term
 critical flow rate
Definition
 velocity at which a liquid or gas turns from laminar to turbulent flow. decreased diameter will increase turbulent flow
Term
 bernoulli's theorem (continuity law)
Definition
 in a tube of varying diameter a decrease in diameter results in an increase in velocity.-tube of varying diameter velocity is inversely proportional to velocity.- as speed of fluid increases the pressure exerted by the fluid decreases. Venturi effect is an example
Term
 venturi flowmeter
Definition
 demonstrates the venturi effect where a pressure differential is created by changing the diameter of a tube. This sub atmospheric pressure draws a second gas inward and allows mixture with first gas.application: variable orifice flowmeter
Term
 boiling point
Definition
 temp at which the vapor pressure of a liquid equals ambient pressure(enough heat energy to activate molecules to leave liquid state to gas state)at elevation requires less energy bc less atm pressure.
Term
 bp desflurane
Definition
 22.8
Term
 bp isoflurane
Definition
 48.5
Term
 bp halothane
Definition
 50.2
Term
 bp enflurane
Definition
 56.5
Term
 bp sevoflurane
Definition
 58.5
Term
 dew point
Definition
 temp at which if a volume of air is cooled moisture precipitates out.increased temp: more water can be helddecreased temp: less water can be held
Term
 vaporization
Definition
 conversion of a volatile liquid to a gas/vaporprocess by which particles escape from the surface ofa liquid-endothermic-will eventually cease due to cooling unless heat is applied to system
Term
 vapor pressure
Definition
 pressure exerted by vapor particles in equilibrium with a liquid-polarity, mass and temperature (factors that effect VP)
Term
 latent heat of vaporization
Definition
 amount of heat absorbed to convert a liquid to a gas at its BP.
Term
 vp of halothane
Definition
 244
Term
 vp of desflurane
Definition
 669
Term
 vp methoxyflurane
Definition
 22.5
Term
 vp enflurane
Definition
 172
Term
 vp isoflurane
Definition
 240
Term
 vp sevoflurane
Definition
 160
Term
 vp water
Definition
 17.5
Term
 heat
Definition
 form of energy transferred from a hotter substance to a cooler substanceflows from high to low
Term
 temperature
Definition
 measure of conductivity of molecules and kinetic energy of molecules-thermal state of a substance which determines whether it will give heat to another substance or receive heat from another substance
Term
Definition
 c= (f-32) x 0.56
Term
Definition
 f= (c x 1.8) + 32
Term
Definition
 k= c + 273
Term
 endothermic
Definition
 requires input of energyice --->water----> vapor
Term
 exothermic
Definition
 requires output of energyvapor--->water--->ice
Term
 heat loss types
Definition
Term
 conduction
Definition
 heat transferred from one point to another by direct contact ex: patient on OR table
Term
 convection
Definition
 heat transfer with fluid flow over a solid while temp is different between fluid and solidex: bear hugger (?)
Term