Lecture 3

Question 0

760 mmHg equals how many psi?

Answer 0

14.7

Question 1

1 mmHg = x cmh2o. What is x?

Answer 1

1.36 cmh2o

Question 2

1 ATM equals how many mmHg?

Answer 2

760 mmHg

Question 3

1033.6 cmh2o is how much psi?

Answer 3

14.7

Question 4

14.7 psi is how many ATM?

Answer 4

1

Question 5

14.7 psi is how many in cmh2o?

Answer 5

1033.6

Question 6

1.36 cmh2o is how many mmHg?

Answer 6

760

Question 7

Boyles law

Answer 7

At constant temp the vol of a given mass of gas varies inversely w absolute pressure

Question 8

Charles law

Answer 8

At a constant pressure, the volume of a given mass of gas varies directly with the absolute temp

Question 9

Third ideal gas law

Answer 9

At a constant vol, absolute pressure of a given mass of gas varies directly with the absolute temp

Question 10

Mercury manometers are good for measuring pressures up to

Answer 10

1 ATM or 760 mmHg

Question 11

What is absolute pressure?

Answer 11

=gauge pressure + atmospheric pressure

Question 12

Compressing air into a tank will release

Answer 12

Lots of Energy as heat

Question 13

Releasing pressure of tank will cause

Answer 13

Hear to be absorbed (frost will appear)

Question 14

Dalton’s law of partial pressures states that

Answer 14

In a mixture of gases the pressure exerted by each gas is the same as that which jt would exert if it alone occupied the container

Question 15

If a mixed gas tank of 50% of each nitrous and o2 reads 1000 psi, the pressure in each tank would read x psi if separated. What is x?

Answer 15

500 psi

Question 16

1L o2 and 1L n2o is what fio2?

Answer 16

50%

Question 17

Avogadros hypothesis

Answer 17

Equal volumes of gases at the same temperature and pressure contain equal numbers of molecules

Question 18

One mole of any gas at stp occupies how many liters?

Answer 18

22.4 at stp

Question 19

Pressure on a nitrous tank will read 750 psi until only x% of the contents remain. What is x in % and in liters?

Answer 19

25% and 400 L

Question 20

What is the molecular weight of nitrous?

Answer 20

44 g (n =14 o=16)

Question 21

Molecular weight of oxygen ?

Answer 21

16

Question 22

Molecular weight of nitrogen?

Answer 22

14

Question 23

Critical temp?

Answer 23

The temp above which a substance cannot be liquefied however much pressure is applied.

Question 24

Critical temp of nitrous?

Answer 24

36.5C (97.7F)

Question 25

At the critical temperature or higher, nitrous is in what state?

Answer 25

Gas

Question 26

Critical temp of o2?

Answer 26

-119C--therefor liquid o2 tanks must be kept very cold to prevent expansion

Question 27

E cylinders of o2 are what kind of cylinders?

Answer 27

Gas

Question 28

Filling ratio

Answer 28

Mass of gas in a cylinder divided by the mass of water which would fill the same cylinder