Definitions And Quick Facts Flashcards

Question

define boyles law

Answer 1

one of the ideal gas laws states that at a set temp pressure is inversely proportional to volume P ∝ 1/V

Answer 2

one of the ideal gas laws that states at a constant pressure volume is directly proportional to temp change V ∝ T

Answer 3

one of the ideal gas laws that states at a constant volume, pressure is proptional to temp change P ∝ T

Answer 4

PV = nRT where n = number of moles R= universal gas constant 8.31J/K/mol

Answer 5

a gas that obeys all 3 laws molecules are infinitely small size with no volume no force of attraction between them Hydrogen is closest however other gases obey laws relatively well.

Answer 6

1 mole of any gas will occupy 22.4L at standard temp and pressure.

Answer 7

1 atm 273.15 K (0 degrees)

Answer 8

heat the air increases volume less dense air rises charles law

Answer 9

daltons law of partial pressures states that each gas exerts a partial pressure of its own in a mixture and the total pressure of a gas mixtures is a sum of individual partial pressures.

Answer 10

model for an ideal gas gases are moving randomly with kinetic energy there volume is a lot smaller than volume between them they travel in straight lines but may collide with eachother and walls of container no attractive foces

Answer 11

kinetic energy = 1/2 m v^2 mass x velocity squared

Answer 12

critical temp N20 = 36.5 O2 = -119 need to cool and apply pressure to liquidify O2 only need to apply pressure to liquidify N20

Answer 13

30 degrees

Answer 14

N20 = 72 bar O2 = 50bar CO2= 73 bar

Answer 15

point at which all phases of water - solid, liquid and gas are in equilibrium occurs at 0.01 degrees, 611kpa (0.006atm)

Answer 16

rate of diffusion ∝ A (Conc dif) / D A = area D = distance / thickness

Answer 17

diffusion of a gas ∝ 1/ root MW

Answer 18

if a gas expands quickly it hasnt got time to take heat from surrounding so instead it cools e.g. cryroprobes - N20 or CO2

Answer 19

-183 O2 - 88 N20 - 80 CO2

Answer 20

Average kinetic energy of a substance ≈ intensity of heat present in a substance

Answer 21

Total kinetic energy of a substance

Answer 22

SI unit for charge where 1 coloumb is equivalent to 6.24x10^18 electrons or the charge that passes a point when 1 ampere of current flows for 1 second

Answer 23

a property of a particle/object that causes attraction/repulsion to other charged objects usually comes from imbalance of electrons/ protons

Answer 24

the opposition to flow this may be opposition to flow of current in electrical circuits or opposition to flow of fluid in electricity its measured in ohms where 1 ohm is the resistance present when 1 V produces 1 amp of current.

Answer 25

measure of flow of charge i.e. coulombs/ sec measured in ampere which is the SI base unit. 1 ampere is the current required to produce 2x10^-7N of force when 2 wires are 1 meter apart in a vacuum of infinite length current can be AC or DC

Answer 26

this is the potential difference and the driving force for current. 1 volt is the energy required to move 1 coulomb of charge between 2 points V = J / C also related to amps and wats via W= AV

Answer 27

sum of reactance and resistance in AC circuits. measured in ohms

Answer 28

the opposition to flow of AC current sum of inductance and capacitive reactance measured in ohm,s

Answer 29

the rate at which work is done measured in watts where watts = joule / sec

Answer 30

a physical property associated with the motion of electrical charge in a material. it has the ability to allign with other magnets or induce ferromagnets.

Answer 31

a material that exhibits strong magnetism due to allignment of magnetic moments with a magnetic field

Answer 32

the strength of a magnetic field measured in weber

Answer 33

strength of a magnetic field per unit area wb / m2 = Tesla

Answer 34

weber is a unit of magnetic flux whereby 1 weber produces 1 volt if a coil of wire with 1 turn were allowed to decay over 1 second

Answer 35

dimagnetic - material that is not magnetic / repelled by magnetics paramagnetic - materials weakly attracted to a magnetic field

Answer 36

Ability for a coil of wire to produce a backwards EMF that resists the flow of current when exposed to changing current measrued in henry

Answer 37

ability for a component to store charge measured in farads farads is the charge stored per voltage applied to a capacitor

Answer 38

SI derived unit for inductance where 1 henry is the inductance that produces a magnetic field of 1wb is produced from 1 ampere of current

Answer 39

a piece of electrical equiptment that allows flow of current if there is current flowing in a 3rd limb can act to control current flow

Answer 40

consists of collection of cells which contain 2 half cells and convert chemical energy to electrical energy

Answer 41

the pressure of the vapour phase of a substance in equilibrium with its liquid phase at a specified temp

Answer 42

the pressure that is required to liquify a substance at its critical temp

Answer 43

the point at which the SVP equals the atmospheric pressure hence either boils if increase temp or reduce atm pressure.

Answer 44

a ratio of the amount of substance in one phase compared to another when 2 phases are of equal volumes, at equal temp and pressure and in equilibrium. for O:G - at 37 degrees relates to potency for B:G at 37 degrees relates to speed of onset

Answer 45

minimum alveolar conc conc of agent that prevents 50% of subjects aged 40 responding to a standard surgical incision when breathing 100% O2 at 1atm with no other anaesthetic agents.

Answer 46

comparison of an individual measuring device with a reference of known true values.

Answer 47

a loss of calibration overtime. needs to be recalibrated a fixed deviation from the true value

Answer 48

the ability for a measurement device to match the actual value

Answer 49

the reproducibility of repeated measurements and their measure of spread