week 7 kinetic molecular theory etc.

Question 0

heat is __ that is transferred as a result of a temperature difference, as such it can be viewed as an __ flow

Answer 0

energy

energy flow

Question 1

what is Brownian motion?

Answer 1

attractive and repulsive forces between H2O molecules making their motion quite random

think of brownies randomly moving around

Question 2

heat is thermal__, whereas temperature is the quantitative measurement of that __

Answer 2

energy

energy

Question 3

What is standard temperature in Kelvin?

Answer 3

273 K

Question 4

anesthesia disrupts thermoregulatory mechanisms by causing vaso__, and thus loss of heat

Answer 4

vasodilation

Question 5

explain core-to-peripheral redistribution of body heat

Answer 5

under anesthesia, our warm core heat flows to our peripheries as a result of vasodilation, especially during the first hour

Question 6

Evaporation is heat loss by way of __ evaporating off your body

Answer 6

water

Question 7

radiation is heat loss between your body and the surrounding __

Answer 7

air

Question 8

convection is loss of heat by __ or wind

Answer 8

fan

Question 9

conduction is loss of heat through direct __ with a colder surface such as a cold OR table

Answer 9

transfer

Question 10

radiation is the transfer of energy between 2 objects that are __ in direct contact but have different temps, radiation is the most significant mech. of heat loss by our bodies under anesthesia

Answer 10

not

Question 11

through what route does a BURN patient lose the most heat?

Answer 11

evaporation

Question 12

rank the routes of heat loss from greatest to least

Answer 12

radiation > convection > evaporation > conduction

Question 13

what percent of heat loss occurs by radiation and convection combined?

Answer 13

70%
40% radiation
30% convection

Question 14

the latent heat of __ is the energy needed to change a liquid into a gas

Answer 14

vaporization

Question 15

the temperature at which the bulk of a liquid converts to a vapor is the __ point. It is the temperature at which the vapor pressure of the liquid equals the atmospheric pressure

Answer 15

boiling

Question 16

what is the vapor pressure of sevo?

Answer 16

157

Question 17

what is the vapor pressure of iso?

Answer 17

238

Question 18

what is the vapor pressure of halo

Answer 18

243

Question 19

what is the vapor pressure of des?

Answer 19

669

Question 20

vapor pressure depends solely on __

Answer 20

temperature

Question 21

will vapor pressure change with changes in altitude?

Answer 21

nope, just changes in temperature

Question 22

What volatile agent would boil in the mountains?

Answer 22

Des, if not kept in an enclosed space, will boil in the mountains because its vapor pressure (669) will be greater than the barometric pressure

Question 23

If you add a higher vapor pressure agent into a vaporizer intended for a lower vapor pressure agent, will you deliver more or less agent to the patient?

Answer 23

more
HLH
higher agent in lower vaporizer = higher concentration to patient

Question 24

If you add a lower vapor pressure agent into a vaporizer intended for a higher vapor pressure agent, will you deliver more or less agent to the patient?

Answer 24

less
LHL
lower pressure agent in higher pressure vaporizer = less agent to the patient

Question 25

what is meant by vapor pressure?
it is the pressure exerted by the molecules in the gas phase when equilibrium is established between the number of molecules both exiting and returning to liquid phase from gas phase.

Answer 25

the vapor pressure of a substance is its partial pressure at the equilibrium point for molecules entering and leaving the gas phase for the liquid phase at a particular temperature

Question 26

What happens when the vapor pressure of a liquid exceeds the total pressure in the gas phase?

Answer 26

when the vapor pressure of a liquid exceeds the total (atmospheric) pressure, the liquid boils

Question 27

what happens to the temperature of a liquid as vaporization occurs?

Answer 27

since vaporization requires energy, the temperature of a liquid DECREASES as vaporization proceeds.

Question 28

what is the difference between the heat of vaporization and the LATENT heat of vaporization?

Answer 28

heat of vaporization is the number of calories necessary to convert 1ml of liquid into vapor

latent heat of vaporization is the number of calories required to change 1 gram of liquid into vapor without a temperature change

latent deals with grams instead of ml’s

Question 29

will your patient get more of less volatile if you accidentally put sevo in your iso vaporizer?

Answer 29

less
sevo 157
iso 238

less vapor pressure agent in a higher pressure vaporizer = less agent to patient
LHL

Question 30

will your patient get more of less volatile if you accidentally put des in your sevo vaporizer?

Answer 30

more
des 669
sevo 157

greater vapor pressure agent in a lower pressure vaporizer = more agent to patient
HLH