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Byju's Answer
Standard IX
Physics
Specific Heat Capacity
For hydrogen ...
Question
For hydrogen Oxygen fuel cell, the reaction is 2H2(g) + O2(g) --------> 2H2O(l) Standard energy of formation of H2O = -237.2 kJ/mol. Hence standard EMF of fuel cell is n nt(1) +1.23 V n nt(2) -2.46 V n nt(3) -1.23 V n nt(4) +2.46 V
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Similar questions
Q.
For hydrogen-oxygen fuel cell, the cell reaction is:
2
H
2
(
g
)
+
O
2
(
g
)
⟶
2
H
2
O
(
l
)
If
Δ
G
o
f
(
H
2
O
)
=
−
237.2
k
J
m
o
l
−
1
, then emf of this cell is:
Q.
Standard free energies of formation (in kJ/mol) at 298 K are -237.2, -394.4 and -8.2 for
H
2
O
(
l
)
,
C
O
2
(
g
)
and pentane (g), respectively. The value of
E
0
c
e
l
l
for the pentane-oxygen fuel cell is:
Q.
Standard free energies of formation(in
k
J
/
m
o
l
) at
298
K are
−
237.2
,
−
394.4
and
−
8.2
for
H
2
O
(
I
)
,
C
O
2
(
g
)
and pentane(g) respectively. The value of
E
o
c
e
l
l
for the pentane-oxygen fuel cell is:
Q.
The standard potential is given below, of the following at
25
∘
C
.
M
n
O
2
→
M
n
3
+
E
∘
=
0.95
V
M
n
+
3
→
M
n
2
+
E
∘
=
1.51
V
The standard potential of
M
n
O
2
→
M
n
2
+
is :
Q.
The standard free energies of formation of
H
2
O
(
l
)
,
C
O
2
(
g
)
an n-pentane are
−
237.2
k
J
,
−
394.4
k
J
,
−
8.2
k
J
. Then the value of
E
0
for pentane-oxygen fuel cell is:
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