The words you are searching are inside this book. To get more targeted content, please make full-text search by clicking here.

## APPLICATIONS OF SPECIFIC HEAT CAPACITY

Related Publications

Discover the best professional documents and content resources in AnyFlip Document Base.

# APPLICATIONS OF SPECIFIC HEAT CAPACITY

### APPLICATIONS OF SPECIFIC HEAT CAPACITY

Harihaaran Sri Mithra Rishween
Surees Gobinathan Nallasivam

MAKER/EDITOR MAKER

1

Specific heat capacity, c of a substance is the quantity of
heat needed to raise the temperature of 1 kg mass of the
substance by 1ºC

Formula of Specific heat Formula of Quantity of heat
capacity

= ∆Ɵ

Q = quantity of heat supplied (J) c = specific heat capacity
m = mass (kg) m = mass (kg)
∆Ɵ = change of temperature ∆Ɵ = change of temperature
Unit = J −1° −1 Unit = Joule

4

Car radiators are heat exchangers used for cooling internal
combustion engines, mainly in automobiles but also in piston-
engine aircraft, railway locomotives, motorcycles, stationary

generating plant or any similar use of such an engine

6

Burning of fuel in car engines The air that drowned in by the The heat is transferred
produces large amounts of heat. radiator fan will be blowed over from the water to the
air that blown next to
This heat needs to be released the cooling fins
to avoid overheating the engine. the water
Then the water becomes hotter
and flows to the radiator to be Then the water will
cooled down by the cooling fins. become cool again and

pumped back to the
engine blocks to

absorb the heat again.

Water will pumped into the The heat from engine This cycle is repeated
engine block block transferred to the continuously to cool

9 water. down the engine.

Water is a cooling agent which can absorb a lot of heat energy. It
has very high specific heat capacity which is 4,200 Joules per
kilogram per degree Celsius (J/kg°C). Water takes 4200 J of heat
energy to raise the temperature of 1 kg of water by 1°C. So, when
water is used in car radiator system, it is able to absorb a lot of heat
produced by car engine without a high increase in temperature. It is
also cheap and can be obtained easily.

11

Probably coolant can replace water in cooling system of car radiator.
A coolant is a substance, typically liquid or gas, that is used to reduce
or regulate the temperature of a system. Specific heat capacity of
coolant is 2420 Joules per kilogram per degree Celsius (J/kg°C) which
is pretty high too. Coolant takes 2420 J of heat energy to raise the
temperature of 1 kg of liquid-state coolant by 1°C. Those who
affordable to buy the coolant will use them in cooling system in car
radiator because it won’t heat up very easily and it will also absorbs
heat but not as much as water absorbs.

13

14