Summary Chapter 9 - Enthalpy

ENT HA L P Y
EN T H A L P Y T OT A L E N E R G Y CO N T E N T OF
RE A L T I N G MA T E R l A L S H

E NT HA L P Y l HAN Gt i t NE RGY E C H A N GE TH A T
T AH E S P L AC E W I T H
S U R RO U N D I N GS A T
ONS TA NT P Rt s S U R E

E N E R GY I N TO S V R RO V N D I N GS
CX O T H E RM I L DH V t

t N t R GY TARE N IN E ND O T H E R M I I DH t v t


CXO THE R Ml C E N DO T H E R M l C
REACTIONSIREACTIONSIC
O MB U S T l 0 N
FRE t 2 I NG
ME L T I N G
B O I L I NG
N E UT R A L I S A T l E LE C T R O l Y s i s
on man na an y ro u
C 0 ND E NS A T l O N S A L T S f R OM H Y D R A TE
D I S P L AC E ME N T f 0 R M I N G C AT l O N
C R Y S T A L L I S I NG f R O M G A S
L l QU I D SA L T S EV AP O R A T l ON
I
T H E R MA L D E l O M PO S I T I 0 N

O NS E R V A T l O N O f E N E R GY
wH t N C H t M l l A L
i
R t A l T l 0 N S T A H E P L AC t HE A T EN E R GY
T R A N S F E R R E D BE TW E E N S 4 S T E M t
S U R R OU N D S
C H f M l C A LS
BOD Y O f S U L U T l ON I N VU L V E D I N
A P P A R A T U S A N 4 T H I NG Rt A l T I UN
NO T T A K I N G P A R T I N l R t A L T A N TS t
R t A l Tl 0 N P R UD U l t s
C X O TH E R M l C i

n a
REACTANTS REACTANTS I
tattit

ft
a no
fat
t PR v

, PATHOFREACTION PATHof REACTION
C N t R 4 Y Of R E A C T A N T S P RO D U L T S
E N E RG Y REL t A s t D U N B O ND F OR M AT I 0 N
MORE THAN A B S O R B E D B R E A H I N G T H t M
t ND U TH t RM l C
In a

1 ENTHALPY



ft n mot th
µ him

REACTANTS REACTANTS


PATHOFREACTION PATHOf REACTION
f N t RG Y OfR t A C T A N T S L P R O DV l t s
E NE R GY A B S O R B E D TO B R E A R B O N D S
G R E A T t R T H A N T H A T R t L t A s t D TO MAKE
THEM
ACT 1 V A T IO N E NE R G Y MI N I M V M t N t R GY
REQ V I R E D BY
R E AC T A N T P A R T l C L E S


L
FO R R E A L T I U N TO
O l l UR
N E R G Y MU S T B E G I V t N
t O OV t R l 0 ME CA AL L
REA C T I 0 N S S T A R T
E N DO THE R M l C
S T A N DA R D C O N D I T I U N S
E N T H A L P Y CH A N G E S D E P E N D O N i
P H Y S I L AL S T A T E Of R t A C T A N T S t
P RO D V C T S
l O N D l T l O N S V N D E R WH I l H R t A l T l O N
o c c v Rs
T E MP L 9 8 K
P R E S S U R t i l 00 hPa
S T A N DA R D C O N C O f I U L U T I U N Imotam 3

DrHtt E N T H A L PY I H AN G E T H A T A l l U M P A N I E S
A R t A CT I 0 N I N MO L A R Q U A N T I T I E S
S HU W N I N l H E M l l AL E Q U A T l O N U ND E R
S T A N D A RD l O N D l T l O NI WI T H AL L
R t AC T A N T S t PROD U L T S I N THE I R
S T A N D AR D S TA T ES