Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

ANES PhysiCs Exam 2 > Gas Laws > Flashcards

Gas Laws Flashcards

cummulative information for exam 2 (49 cards)

Start Studying
1
Q

What are the vales for :

Absolute pressure and temp

Room pressure and temp

Body temp

A

Absolute – 273.15 K 0 C @ 1 atm

Room - 293K 20 C @ 1 atm

Body - 310K 37 C @ 1 atm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Law— at a constant temperature, the volume of a given mass of gas varies inversely with the absolute pressure ?

A

Boyle’s Law

P1V1 = P2V2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is constant in Boyle’s law?

A

Temperature: “Boyle had TB”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Formula for ideal gas law?

A

PV=nRT (NOTE: Pressure and Temp are Absolute)

use to derive the 3 gas laws

P = pressure

V = volume

n = number of moles

R = ideal gas constant

T = temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is an example of applying Boyle’s law?

A

calculating the amount of oxygen available at 1 atm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

1 atm = _____ kPa

A

1 atm = 101.33 kPa 1 atm ~ 100 kPa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the water capacity of an E cylinder?

A

4.8 L

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

1 atm = _____ psi

A

14.7 psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Law — at a constant pressure, the volume of a given mass of gas varies directly with the absolute temperature?

A

Charles’s Law

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the contant in Charles’s Law?

A

pressure; “Charles had CP”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Law— at a constant volume, the absolute pressure of a given mass of gas varies directly with the absolute temperature?

A

Don’s Law

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is constant in Don’s Law?

A

volume; “Don had VD”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

When given a problem to solve, how do you decide which gas law to use?

A
  1. set the variables = to the constants 2. drop the constants 3. use given variables to solve for the unknown variable
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is STP?

A

Standard Temp and Pressure T= 273 K, 0 C P= 760 mmHg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is RTP?

A

Room Temp and Pressure T= 293 K, 20 C P= 760 mmHg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is BTP?

A

Body Temp and Pressure T= 310 K, 37 C P= 760 mmHg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

A fire breaks out in the dental office near the nitrous tank storage room, what could happen to the tanks? why?x

A

a. explode b. heat would cause the gas to expand, therefor increase pressure with in the tank

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

How does the cryprobe work?

A

adiabatic process

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is adiabatic process?

A

altering the state of gas without allowing the gas to exchange heat energy with it’s surroundings. Adiabatic heating = rapid pressure increase(compression) Adiabatic cooling = rapid pressure decrease (expansion)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Law— in a mixture of gases the pressure exerted by each gas is the sames as that which it woudl exert if it alone occupied the container?

Study These Flashcards
A

Dalton’s Law of Partial Pressure

21
Q

How is the ideal gas law applied to partial pressures?

Study These Flashcards
A

The ratio of partial volumes to partial pressures is equal and equals the ratio of total volume to total pressure

22
Q

What type of problem might Dalton’s Law be used in ?

Study These Flashcards
A

calculating the partial pressure of O2 against partial pressure of N2O in the same tank

23
Q

What is the pressure inside the O2 E cylinders used in the hospital?

24
Q

What is the volume in O2 E cylinders that we use at the hospital?

25
What is the relative nominal cylinder pressure at constant temp 15 C in an O2 E tank?
137 bar
26
What is the relative contents (in L) at constant temp 15 C in an O2 E tank?
680 L
27
What idea can be used to calculate the real values of compressed gases as compared to Boyle's law?
van der Waals forces
28
What is water vapor pressure at 37 C? (in mmHg)
47 mmHg
29
What is water vapor pressure at 37 C? (in kPa)
6.3 kPa
30
Formula for alveolar partial pressure devired from ETCO2
PACO2 = [(Ambient pressure - H2O vapor pressure) x CO2 concentration]/100 example : ETCO2 = 5.6 % PACO2 = [(101.3 kPa - 6.3 kPa)(5.6%)] = 5.3 kPa which = 40 mmHg
31
State Avogadro's hypothesis
equal volumes of gases at the same temperature and pressure contain equal numbers of molecules
32
What is avogadro's number?
1 mole = 6.022 X 1023 molecules
33
1 mole at STP (standard) occupies how much volume?
22.4 L
34
1 mole at RTP (room) occupies how much volume?
24 L
35
1 mole at BTP occupies how much volume?
25.4 L
36
what happens to CO2 (at RTP) that was insuflated into adbomen?
expands d/t body temp
37
What is the PAO2 at the following FiO2 : .21 .50 1
PAO2 @ 0.21 = 100 mmHg PAO2 @ 0.50 = 300 mmHg PAO2 @ 1 = 663 mmHg
38
state the formula for Alveolar Oxygen Equation
PAO2 = FiO2(PB - PAH2O) - (PACO2/R) PAH2O = 47 mmHg (vapor pressure) PACO2 = 40 mmHg
39
What is critical temp?
temperature above which liquification does not occur
40
what is critical pressure?
the pressure (= vapor pressure) at the critical temperature
41
what is the critical temp of nitrous oxide
36.5 C
42
When would you be able to use boyle's law to calculate the pressure in a nitrous oxide tank?
when all the liquid is gone (1/4 full) gas pressure only in the tank a745 psi(g)
43
what is the definition of a gas
a substance above its critical temperature (i.e. O2, N2 at RTP)
44
what is the definition of a vapor?
A susbstance in a gas like state but below it's critical termperature (i.e. N20, CO2, Sevo @ RTP)
45
what allows the pressure out of N2O tank that has been exposed to increase temperatures
temperature dependent fusable plugs
46
how do you calculate filling ratio
mass of gas (kg) / mass of H20 that would fill cylinder 1 L H20 = 1 kg for mass of gas, add atomic weights Mass of gas (kg) / volume of cylinder (L)
47
Filling ratio in the US
0.68
48
Filling ratio in the UK
0.75
49
What is the tare (empty) weight of an E cylinder? H Cylinder?
E = 14 kg H = 119 kg

ANES PhysiCs Exam 2 (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions