test unit 2

Question 1

pressure equation

Answer 1

p= f/a

Question 2

pressure

Answer 2

force exerted over an area

Question 3

diffusion

Answer 3

the process of particles moving from high to low concentration

Question 4

draw diffusion particles diagrams

Answer 4

check US

Question 5

what do collisions do?

Answer 5

transfer energy and alter direction

Question 6

Compraing solids liquids and gases

Answer 6

strongest attraction, weaker, weakest
most dense, less, least
rigid, fluid, fluid
definite shape, no, no
definite volume, yes, no
moves slowest, faster, fastest
most organized, less, least

Question 7

particles diagrams for solid, liquid, gas

Answer 7

check US

Question 8

what does Eth mean

Answer 8

thermal energy!!

Question 9

practice PVT problems

Answer 9

do it

Question 10

whats standard temp

Answer 10

273 K

Question 11

what does directly proportional graph look like

Answer 11

draw it

Question 12

what does inversely proportional graph look like

Answer 12

draw it

Question 13

what does not proportional graph look like

Answer 13

draw it

Question 14

comparing directly, inversely, and not proportional graphs

Answer 14

goes through origin, does not, does not
linear, curve, linear
has same ROC (slope), not a straight line, no

Question 15

directly proportional equation(s)

Answer 15

P/n=K(constant)
P/kelvin=K
P/inverse volume=K
V/Kelvin=K

Question 16

inverse proportional equation(s)

Answer 16

PV=K

Question 17

not proportional equation(s)

Answer 17

anything to do with celcius

Question 18

What is kinetic molecular energy and what are the basic tenets of it?

Answer 18

moving lumps of stuff theory
1) all matter is made of atoms that are really small and constantly moving
2) all movement is random
3) when atoms collide there is no energy lost
4) attractions pull things together, repulsions push things apart

Question 19

manometer is used to

Answer 19

compare the pressure of gas to air pressure

Question 20

how to do manometer questions

Answer 20

know how to draw j incase
gas is wherever the bubble is
subtract gas and air
if gas greater than air: add the air pressure and differences
if air greater than gas: subtract the air pressure and differences

Question 21

barometer

Answer 21

measures air pressure

Question 22

be able to draw a barometer

Answer 22

maybe

Question 23

what happens to particle motion when energy is added

Answer 23

particles speed increase

Question 24

describes the process of how the arrangement of particles changes during phase changes

Answer 24

as phase changes occur, particles either spread out and become less organized or condense and become more organized

Question 25

Explain at the particle level how a thermometer measures the temperature of a system. Draw particle diagrams to support

Answer 25

the thermometer says if something is thermally expanding or contracting based on the heat of the substance the thermometer is being put it. when in warmer a substance, energy from substance is transferred into the alcohol of the thermometer causing thermal expansion so can see what mark the alcohol in the thermometer is at. when in cooler substance, energy from alcohol in thermometer is transferred into the surround substance thermometer is in causing thermal contraction can see what mark the alcohol in the thermometer is at.

Question 26

How the Celsius temperature scale was developed

Answer 26

Celsius Put liquid mercury in a test tube at room temperature and put it in freezing cold water and then when it froze he marked it as 0 degrees celsius. then he put the test tube in boiling hot water and when the liquid mercury boiled boiled he marked the temperature at 100° C

Question 27

How a barometer works

Answer 27

In a barometer there's mercury in a beaker and then a tube in the beaker and when air pressure pushes down on the Mercury the tube goes up

Question 28

Barometer on hot versus cold days

Answer 28

on hot days tube of tube is pushed up On cold it is not

Question 29

Explain the basis for the Kelvin scale what is absolute temperature

Answer 29

The basis for the Kelvin scale is 0° Kelvin, which is absolute zero( the coldest temperature a molecule can be and has no thermal energy) absolute temperature is when the temperature is at Absolute Zero like I just described)

Question 30

how to convert from celsius to kelvin temp

Answer 30

add 273 to the Celsius

Question 31

Pressure and volume particle diagrams and explain low vs. high pressure

Answer 31

LOW because there is less force exerted on the particles, and thus, a larger area for the particles to collide in, there are less collisions happening creating less or lower pressure HIGH Because there is more force being exerted on the particles, and thus, a smaller area for the particles to collide in, there are less collisions happening between particles which creates a lower pressure

Question 32

what causes pressure

Answer 32

collisions!

Question 33

Pressure and number of particles particle diagram and explain low vs. high pressure

Answer 33

LOW Because there are only 5 particles in this diagram, they are more dispersed and thus haves less collisions and less force which creates a lower pressure HIGH Because there are 11 particle sin this diagram, more force is being created because there are more collisions; thus, pressure is increasing to higher pressure

Question 34

Pressure and temp. particle diagram and explain low vs. high pressure

Answer 34

LOW bc the temp is lower, the particles are moving at a slower pace, thus, less collisions are occuring creating less force and a lower pressure HIGH bc the temp is higher, the particles are moving at a faster pace, thus, more collisions are occuring which means there is a higher force and thus a higher pressure

Question 35

What variables are directly proportional

Answer 35

pressure and number of particles pressure and kelvin temp pressure and inverse volume volume and kelvin temp

Question 36

What variables are inversely proportional

Answer 36

pressure and volume

Question 37

What variables are inversely proportional

Answer 37

anything with celsius

Question 38

Draw particle diagrams based on densities of two substances (how)

Answer 38

whichever substance is more dense