chapt 7 : the particulate nature of matter

Question 1

definition of diffusion

Answer 1

the net movement of particles from a region of higher concentration to a region of lower concentration

Question 2

definition of osmosis

Answer 2

the net movement of water molecules from a region of higher water potential to a region of lower water potential through a partially permeable membrane.

Question 3

does dilute have more or less water ?

Answer 3

more

Question 4

does concentrated have more or less water

Answer 4

less

Question 5

what is FAMS in particulate model of matter

Answer 5

forces of attraction
arrangement
movement
space

Question 6

why are solids in fixed shape

Answer 6

they are fixed in their positions , hence they cannot move out of their positions to change the shape of the solid

Question 7

why are liquids in a indefinite shape

Answer 7

they are free to slide across one another and move randomly, hence they can move out of their positions to change the shape of a liquid.

Question 8

why are gas in a indefinite shape

Answer 8

they move randomly in all directions ,hence it doesn’t have a fix shape

Question 9

why are solids not compressible

Answer 9

they are unable to be compressed further as they are very closely packed and hhence cannot come any closer to be compressed

Question 10

why are liquids not compressible

Answer 10

they are unable to be compressed further as they are closely packed and hence cannot be compressed

Question 11

why are gas compressible

Answer 11

they can be compressed further as they are far apart and has more space to be compressed.

Question 12

why do solids have a definite volume

Answer 12

particles in a solid are very closely packed to one another hence they are not able to move a closer together to decrease the solids volume
they are also very strongly attracted hence they are not able to move further apart to decrease the solids volume

Question 13

why do liquids have a definite volume

Answer 13

particles in a liquid are closely packed to one another hence they are not able to move closer together to decrease the volume of liquid.
they are also strongly attracted hence they are not able to move further apart to decrease the liquids volume.

Question 14

why do gas have a indefinite volume

Answer 14

particles in a gas are far apart hence they are able to come closer together to decrease the gas’s volume. particles also have weak forces of attraction, hence they are also able to move further from each other to increase the gas’s volume.

Question 15

why are solids not able to flow

Answer 15

solids are not able to flow as they are fixed in their position hence they cannot move out of their position to flow

Question 16

why are liquids able to flow

Answer 16

liquids are able to flow as they are free to slide across one another, hence they can move out of their position to flow

Question 17

why are gas able to flow

Answer 17

gas are able to flow as they are randomly moving in all directions , hence they can move out of their position to flow.

Question 18

why do solids have high density

Answer 18

particles in a solid are very closely packed hence the number of fixed volume is high and the density is high

Question 19

why do liquids have moderate density

Answer 19

particles in a liquid are closely packed hence the number of fixed volume is high (but lower than solid) and the density is moderately high.

Question 20

why do gas have low density

Answer 20

particles in a gas are far apart hence the number of fixed volume is low and the density is low.