Heat Transfer

HEAT TRANSFER

unce (HOT)
->
k(COLD)




ANISMS
OS HEAT TRANSFER


CONDUCTION-HEAT TRANSCER IN WHICH ENERGY IS TRANSFERRED OROM A REGION Of
IN SOLIDS
HIGH TEMPERATURE TO AN AREA OS LOW TEMPERATURE BY THE KINETIC

MOTION OS ELECTRONS OR THE DIRECT IMPACT Of MOLECULES



CONNECTION-HEAT TRANSSER IN WHICH ENERGY IS TRANSFERRED CROM A REGION Of

IN CLUIDS
HIGH TEMPERATURE TO AN AREA OS LOW TEMPERATURE BY MIXING/MOTION


RADIATION-HEAT TRANSCER IN WHICH ENERGY IS TRANSFERRED OROM A REGION OS HIGH
BETWEEN BODIES
TEMPERATURE TO AN AREA OS LOW TEMPERATURE BY ELECTROMAGNETIC

WAVES



UA ENERGY IN HEAT TRANSSER
OfTION




XACCUMULATED
HEAT t
HEAT RELEASEDI HEAT HEAT
IN CONSUMED OUT
/BY A REACTION)

, HEAT CAPACITIES + LATENT HEATS

HEAT CAPACITIES
C


d W ⑮
du

⑰
--
mcn
Cr
=
=
dT dT


t ↓ t ↓
-
Cp C R
= +
X
Cp C HR
= +




UPPER CASE C =
MOLAR SPECICIC HEAT CAPACITY LOWER CASE = SPECIOIC HEAT CAPACITY



-

mp
(TB-Tal

⑰CHANGES
->
PHASE CHANGES OCCUR AT CONSTANT TEMPERATURE LOR A PURE

SUBSTANCES


->

THE ENERGY REQUIRED LOR A PHASE CHANGE IN KNOWN AS THE LATENT

HEAT


SOLID
-
-
El
1- g(SOL)
Why + Ohs=ATENthent
Of CUSION




LIQUID as
-
(UG) + Ohn thr Atentment


⑱ Er Of VAPORISATION




S


argitical
->
NOTE THAT THE BOILING POINT IS ALSO

LIQUID
I Ohr THE SAME TEMPERATURE AT WHICH A GAS

- WILL CONDENSE INTO A LIQUID



-
Socia /ons