Chemistry Ch 5

Question 0

Formula pressure

Answer 0

Pressure = F/A

Pressure equals force divided by area

Question 1

What is the kinetic energy formula?

Answer 1

KE= 1/2 mv^2

Question 2

What is STP

Answer 2

Standard temperature and pressure

0°C (273.15 K) and 1 atm or 750 torr

Question 3

Gay-Lussac’s Law of combining volumes

Answer 3

When measured at the same temperature or pressure The ratios of the volumes of gasses That react or that are formed as products are small whole numbers

Question 4

Avogadro’s law

Answer 4

Equal volumes of gases at the same temperature and pressure contained Equal numbers of molecule. Volume equals a kinetic energy when pressure and temperature are constant V=kn (N=#of miles in a gas)

Question 5

What is the pressure of a gas

Answer 5

The result of the collisions of the gas molecules with the vessel wall

Question 6

Molar volume

Answer 6

The volume of one mole of gas under STP conditions Average 22.4 L

Question 7

I WUB YOU MOM

Question 8

The gas conversion factor between gas volume and moles of gas is this?

Answer 8

22.4 L/1 mole or 1 mole/22.4L

For Only gas at STP

Question 9

The ideal gas equation is:

Answer 9

PV=nRT

Question 10

What is the ideal gas constant (R)

Answer 10

(1atm) •(22.4L)
- ————– =0.0821L•atm\K•mole
(1mole) •273K

Question 11

What Are the five postulates for the kinetic molecular theory

Answer 11

1) Gas molecules on constant, rapid motion, moving straight lines until they collide with each other or those another substance such as the containers
2) Gas molecules undergo elastic collisions no energy lost when they collide
3) the kinetic energy of gas molecules is directly related to temperature
4) Gas molecules are very far apart and negligible and volume compared to the volume of the gas
5) Gas molecules have negligible attractive forces between them

Question 12

Diffusion

Answer 12

The process of mixing molecules of one substance through another by random molecular motion

Question 13

Grams law of diffusion

Answer 13

Rate of diffusion Is proportion to

                 1 ------------------------------ Square root of Molar mass

50 fusion rate of any gas is inversely proportional to the square root of the gas’s molecular mass

Question 14

Formula for Boyles law

Answer 14

V = k 1/p. or. Pi Vi=Pf Vf

V= Volume
K= constant Proportional
P= Pressure

Question 15

What’s the constant in Boylrs law

Answer 15

Temperature

Question 16

What is the constant in Charles”s law

Answer 16

Pressure

Question 17

What’s the formula for Charles is law

Answer 17

Vi. Vf
— = —
Ti. Tf

Question 18

What scale must be used for Charles is Law

Why?

Answer 18

Kelvin

Because it is the only scale that can account for absolute zero. It never goes into negative

Question 19

The gas laws are assuming what type of gas is being used

Answer 19

An ideal gas. Or gas under an ideal situation Which does not exist

Question 20

What is the combination gas law

Answer 20

Pi.Vi. Pf Vf
—– = ——
Ti Tf

Question 21

What is the standard temperature and pressure in STP

Answer 21

273.15° K. (0° C) Temperature

760° torr or 1 atm

Question 22

Gases at equal volumes equal pressure and equal temperatures have what in common

Answer 22

The same number of molecules

Question 23

What determines a gases kinetic energy

Answer 23

Temperature

Question 24

What is the volume of one mole of gas

Answer 24

22.4 L

Question 25

What a the universal gas constant

Answer 25

.0821 L atm
——-
k mol

Question 26

What is the ideal gas equation

Answer 26

PV = nRT

R is always what value?

.0821