MATAHARI

TINDAK BALAS KIMIA

SUMBER HABA

SUMBER ELEKTRIK

PEMBAKARAN BAHAN API

PUSAT BUMI

memasak Menghasilkan air panas untuk mandi Mendidihkan air

Memulakan Proses kimia

Penyulingan petroleum KEGUNAAN TENAGA HABA DALAM HIDUPAN HARIAN

Menghasilkan Elektrik

Membekal haba

Mengeringkan baju

Mengeram telur

Mengeringkan rambut

95 95 To study the difference between heat and temperature

Both cubes have the same temperature (kedua-dua cubes mempunyai sama suhu) Cube P contain more heat than cube Q (cube P mempunyai lebih haba daripada cube Q) The mass of iron cubes The final temperature of water The initial temperature of water in the If the mass of iron beakers big, then the final temperature of cubes is Water higher. If the mass of iron cube is small, then the final temperature of water Lower.

A form of energy Measured in joule (J)

the degree of hotness or coldness of an object. measured in degree Celcius (C) Or kelvin.

No, because the metal ball had expand Yes, because the metal ball had contract Heat cause the solid to expand and contract.

The level of mercury in the thermometer had increase The level of mercury in the thermometer had decrease

The level of mercury Cecair mengembang bila in the thermometer had increase bila Cecair mengecut dipanaskan disejukkan The level of mercury in the thermometer had decrease

The level of the indicator had increase. Because the gas expand When heated. The level of the indicator had decrease because the gas contract.

Heat can cause gases to expand and contract

Gas mengembang bila dipanaskan Jadi petunjuk warna akan naik

Haba dipindahkan melalui 3 cara

Konduksi-untuk pepejal Perolakancecair dan gas sinarangas When heat flows through solid(pepejal)

S,R, Q

P hot

T cold

conduction

Convection (perolakan) is the transfer of heat in liquids and Gases carried oout by moving particles

(Radiation(sinaran)- pemindahan haba dari satu sumber haba ke kawasan lain tanpa melibatkan pepejal/cecair)

Conical flask Temperature

P

Q

R

S

T

Initial temperature 100 100 100 100 100 (C) (C) (C) (C) (C)

Final temperature

80 82 70 87 85 (C) (C) (C) (C) (C)

Pepejal---gas Gas -------cecair sublimation

Cecair pepejal freezingMelting (pepejal-cecair)

Cecair---gas Boiling/evaporation

Gas----cecair condensation

liquid melt gases

gases

Water droplet condence

solid freezing

evaporate

turn./change

gases liquid