Chemical Story lines - Developing Fuels Notes

Chemical Story lines - Developing Fuels Notes

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  • Created on: 09-06-14 18:49
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Chemi
cal
St
ory
li
nes
­Devel
opi
ng
Fuel
s [CHEMISTRY REVISION NOTES]
CHEMISTRY AS
DEVELOPING FUELS (NOTES)
References: Chemical Storylines, Chemical Ideas
(OCR 21st Century), CGP
Made by Nabilah Chowdhury
Copyrighted
DF1: Vehicles of the future
El
ect
ri
c v
e hi
cl
es:
1
|
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Chemi
cal
St
ory
li
nes
­Devel
opi
ng
Fuel
s [CHEMISTRY REVISION NOTES]
PRO's CON's
C l
ean,
qui
et P oor
perf
orma nce
N o
exhaust
pol
lut
ion L ong
rechargi
ng t
imes b/
c ener
gy
is
t
ransf
err
ed
slower=
inconveni
ent
Exempt
f
rom
congest
ion
char
ges L ot
s more
en er
gy r
equir
e d
to
char
ge
i
t
Li
mitat
ions
of
usi
ng f
uel
s:
1.…read more

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Chemi
cal
St
ory
li
nes
­Devel
opi
ng
Fuel
s [CHEMISTRY REVISION NOTES]
Comb ust
ion
always
produces
C O2 and
H 2O. I
t
is
an
o xi
dati
on
react
ion
because
the
fuel
can'
t
rel
ease
ener
gy
unt
il
i
t
binds
w i
th
oxygen rel
eases energ y
= EXO THER MIC ­ve val
ues
of
enthal
py
change .…read more

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Chemi
cal
St
ory
li
nes
­Devel
opi
ng
Fuel
s [CHEMISTRY REVISION NOTES]
CON's of oxygenated fuels PRO's of oxygenated fuels
More
oxy gen i
n f
uel less ener
gy
given
out
b/
c l
ess
Have hi
gh er
octane
numb e r
oxi
dat
ion is
taki
ng pl
ace .…read more

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Chemi
cal
St
ory
li
nes
­Devel
opi
ng
Fuel
s [CHEMISTRY REVISION NOTES]
4.1: Energy out, energy in
Law of conservation of energy:
Energy
cannot
be
destroyed
or
creat
ed but
onl
y t
ransf
err
ed f
rom
o ne
f
orm to anot
her.
Th e
total ener
gy of
a
syst
em of
react
ing
chemical
s and
surr
oundings
remains
constant.…read more

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Chemi
cal
St
ory
li
nes
­Devel
opi
ng
Fuel
s [CHEMISTRY REVISION NOTES]
H c St
an dar
d H of
combust
ion
w hen
one mol
e of
a
substance
is
burnt
complet
ely
in
oxygen,
under
st
andard
condit
ions
of
1at
m and 298K,
i
n st
and ar
d st
ates.…read more

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Chemi
cal
St
ory
li
nes
­Devel
opi
ng
Fuel
s [CHEMISTRY REVISION NOTES]
Wh en
me asur
ing
the ener
g y
produced
fr
om a
comp ound,
w at
er
is
used t
o mea sur
e t
he
amo unt
of
heat t
his
i
s because
of
it
s speci
fi
c absor
pti
on of
energy.
The experi
men t
above
is
very
inef
fi
cient
.…read more

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Chemi
cal
St
ory
li
nes
­Devel
opi
ng
Fuel
s [CHEMISTRY REVISION NOTES]
o
Temper
atur
e Af
ter
: 30 c
o
Temper
atur
e Di
ff
erence: 10 c
I
nit
ial
Mass: 160.
12g
Fi
nal
Mass: 159.
4Gg
Di
ff
e r
ence 0.
75g
1.H eat
gi
ven
o ut
by
H exane:
200 x
4.2
x 10 = 8400J
2.N umber
of
mo l
es burnt
t
o gi
ve heat:
0.
75/8 6
= 0.…read more

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Chemi
cal
St
ory
li
nes
­Devel
opi
ng
Fuel
s [CHEMISTRY REVISION NOTES]
Many ent
halpy
changes
of
for
ma t
ion
react
ions
do
not
occur
under
standar
d condi
ti
ons,
and
so
they
cannot
be
dir
ectl
y measur
ed
how ever
t
hey can
be measur
ed i
ndi
rect
ly
usi
n g
energy
cycl
es.
El
eme nt
s r
eact
t
o f
orm a compound.…read more

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