Question

Q1:wat is matter?? state different types of matter n their properties.??
Q2: mercury is used in laboratory thermometers at room temperature, which state of matter does it exist in?
Q3:1) in which state of matter can the particle move most freely?
2)in which state of matter are particles closest together??
Q4: state the kinetic particle theory, n explain why liquid have fixed volume but not fixed shape??
Q5; define melting point, freezing point,boilng point, evaporation n condensa

Answer 1

1) Matter: anything that has mass and occupies space...
types of matter:

1) Solid
- it has definite shape and size,volume
-its molecules are closely packed together, that's the reason why it has definite shape and size..
example: ball, scissors, tv, cellphone, pen, computer, etc...

2) Liquid
-it occupies the shape of its container , has fixed volume
- its molecules are far apart,
-don't have definite size and shape
example: water, soda, saliva

3) Gas
-Particles are highly free of inter-attractions, no definite shape,no definite volume
- its molecules are very far apart
example: air, CO2, helium

4) Plasma
-have some properties of liquid, and have some properties of solid
example: Gelatin, Blood, Hair Gel
Source: Yahoo answers :)

Answer 2

2)Liquid state...

Answer 3

3) 1) gaseous state...particle moves most freely (because of reduced intermolecular attractions)
2)Solid state ......particles are closest together.....they cant move away from their positions, but of course can vibrate about their mean position when sufficient energy is supplied.

Answer 4

KINETIC THEORY OF particles: i dont know the statement but... http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/heatingandcooling/heatingrev2.shtml ....
according to this theory, liquids have definite volume , because liquid particles can move around each other,, they dont have fixed shape because they Can FLOW .....and they can flow bcos they can move around each other....

Answer 5

MELTING POINT: temperature at which solid becomes a liquid at STP,,,or the temperature at which the vapour pressure of liquid is equal to the vapour pressure of solid ,,,,,

Answer 6

FREEZING POINT: same as melting point,, temp at which liquid changes to solid..

Answer 7

EVAPORATION:Evaporation is the process where atoms/molecules at the surface of the liquid gain enough energy to escapefrom the liquid phase to the gaseous phase. its a surface phenomenon and different from BOILING which is a bulk phenomenon

Answer 8

CONDENSATION: just the opposite of evaporation,,,the particles (gaseous) lose energy to the surroundings and fall back to liquid state