(we all just wna be big rockstars)

whispers

gone with the wind

cbox highly recommended

run away

as fast as you can

CHARA♥ | DAWN♥ XINYAN♥

XO-FATE♥ |

Monday, November 3, 2008 | 2:53 AM

Holiday has finally come :)
EOY is over i hope everyone is satisfied with their result...
This blog is rusting i m not posting anymore...Bye...

Last Post for Sept....

Thursday, September 4, 2008 | 9:10 AM

Hey, that is all i am going to post...i will stop for now...Hope you find my blog useful in a way or another...i have covered chapt 7,8,9 i guess its time to study hard for our EOY... Do leave a tag when u visit =) bye bye...

Evaporation

| 8:02 AM

Evaporation
(a) Occurs at any tempt

(b) Slow process

(c) take place only on liquid suface

(d) No bubbles formed

(e) Tempt may change

(f) heat energy is supplied by the surrounding

Application of Evaporation
1.Refrigerator: uses the principle of condensation & evaporation to keep its content cold
2.Drying clothes; it is common here in S'pore thta we see every household hanging their clothes on a bamboo pole, this uses the idea ofevaporation to dry it

Factors that affects the rate of evaporation
1.Temperature:
Higher tempt, rate of evaporation is faster

2.Humidity:
As humid increases, rate of evaporation decreases

3.suface area Exposed:
Larger suface area, the faster the rate of evaporation

4.Movement of air:
Moving air(wind) is present, evaporation increases

5.Pressure:
Lower atmospheric pressure(higher altitude), increase rate of evaporation

6.Boiling point of liquid:
Lower boiling point evaporate faster

Boiling & Condensation

| 7:33 AM

Boiling:
a liquid is changed to a gaseous state(water vapour)

Why does the outside of your cold glass have water droplet? Why is the mirror in the shower fogged up after you step out?
Condensation:
(a)reverse f boiling point, from gaseous to liquid state
(b)thermal energy is given out

Melting & Solidification

| 6:50 AM

Melting

(a) a process where solid is changed to liquid state

(b) Melting point of ice is 0ºC
Solidification
(a) reverse of melting, from liquid to solid state
(b) Since the melting point of ice is 0ºC, solidification starts to occur

(c)When solid melts the strong intermolecular bonds needs to be broken, to do so energy is needed. That is why there is no change in the temperature during melting.
(d)When liquid molecule come together & solidfy, intermolecular bonds are formed. THERMAl energy is therefore given out

chapter 9, Internal Energy

| 6:34 AM

(an eg of potential energy, Compressed & stretched)
Internal Energy:

-consists of Kinetic & potential energy

Kinetc Energy:

(a)Due to vibration of particles

(b) Higher tempt, more vigorous the particles is

Potential Energy:

(a) Due to the stretching & compressing of the intermolecular bonds as the particles vibrate

(b) Amount of p.e is dependent on this 2 factor the Force & the Distance the particles are apart

Interesting Videos....

| 5:26 AM

Enjoy these Videos

The water is distilled water that has been microwaved for a few minutes. The white powder added is sugar because it has a pretty big surface area.
Tap water is less likely to have this effect because of the impurities in the water.