The value of Δ H f ° for HBr( g ) was first evaluated using the following standard enthalpy values obtained experimentally. Use these data to calculate the value of Δ H f ° for HBr( g ). Cl 2 ( g ) + 2 KBr ( a q ) → Br 2 ( a q ) + 2 KCl ( a q ) Δ H ° = − 96.2 kJ H 2 ( g ) + Cl 2 ( g ) → 2 HCl ( g ) Δ H ° = − 184 kJ HCl ( a q ) + KOH ( a q ) → KCl ( a q ) + H 2 O ( l ) Δ H ° = − 57.3 kJ HBr ( a q ) + KOH ( a q ) → KBr ( a q ) + H 2 O ( l ) Δ H ° = − 57.3 kJ HCl ( g ) → dissolving in water HCl ( a q ) Δ H ° = − 77.0 kJ Br 2 ( g ) → dissolving in water Br 2 ( a q ) Δ H ° = − 4.2 kJ HBr ( g ) → dissolving in water HBr ( a q ) Δ H ° = − 79.9 kJ
The value of Δ H f ° for HBr( g ) was first evaluated using the following standard enthalpy values obtained experimentally. Use these data to calculate the value of Δ H f ° for HBr( g ). Cl 2 ( g ) + 2 KBr ( a q ) → Br 2 ( a q ) + 2 KCl ( a q ) Δ H ° = − 96.2 kJ H 2 ( g ) + Cl 2 ( g ) → 2 HCl ( g ) Δ H ° = − 184 kJ HCl ( a q ) + KOH ( a q ) → KCl ( a q ) + H 2 O ( l ) Δ H ° = − 57.3 kJ HBr ( a q ) + KOH ( a q ) → KBr ( a q ) + H 2 O ( l ) Δ H ° = − 57.3 kJ HCl ( g ) → dissolving in water HCl ( a q ) Δ H ° = − 77.0 kJ Br 2 ( g ) → dissolving in water Br 2 ( a q ) Δ H ° = − 4.2 kJ HBr ( g ) → dissolving in water HBr ( a q ) Δ H ° = − 79.9 kJ
The value of
Δ
H
f
°
for HBr(g) was first evaluated using the following standard enthalpy values obtained experimentally. Use these data to calculate the value of
Δ
H
f
°
for HBr(g).
Cl
2
(
g
)
+
2
KBr
(
a
q
)
→
Br
2
(
a
q
)
+
2
KCl
(
a
q
)
Δ
H
°
=
−
96.2
kJ
H
2
(
g
)
+
Cl
2
(
g
)
→
2
HCl
(
g
)
Δ
H
°
=
−
184
kJ
HCl
(
a
q
)
+
KOH
(
a
q
)
→
KCl
(
a
q
)
+
H
2
O
(
l
)
Δ
H
°
=
−
57.3
kJ
HBr
(
a
q
)
+
KOH
(
a
q
)
→
KBr
(
a
q
)
+
H
2
O
(
l
)
Δ
H
°
=
−
57.3
kJ
HCl
(
g
)
→
dissolving in water
HCl
(
a
q
)
Δ
H
°
=
−
77.0
kJ
Br
2
(
g
)
→
dissolving in water
Br
2
(
a
q
)
Δ
H
°
=
−
4.2
kJ
HBr
(
g
)
→
dissolving in water
HBr
(
a
q
)
Δ
H
°
=
−
79.9
kJ
2. Identify the strongest type of intermolecular force that exists between each pair of
compounds:
a. Ammonium chloride / H₂O
b.
OH
C.
d.
REPORT FOR EXPERIMENT 9 (continued)
NAME
F. Solubility vs. Temperature; Saturated and Unsaturated Solutions
Data Table: Circle the choices which best describe your observations.
NaCl
1.0 g +5 mL water
1.0 g +5 mL water
+1.4 g
dissolved completely? yes/no
saturated or unsaturated?
dissolved completely? yes/no
saturated or unsaturated?
2.4 g +5 mL water
+heat
dissolved completely? yes/no
saturated or unsaturated?
2.4 g +5 mL water
after cooling
dissolved completely? yes/no
saturated or unsaturated?
NHC
dissolved completely? yes/no
saturated or unsaturated?
dissolved completely? yes/no
saturated or unsaturated?
dissolved completely? yes/no
saturated or unsaturated?
dissolved completely? yes/no
saturated or unsaturated?
G. Ionic Reactions in Solution
1. Write the word and formula equations representing the chemical reaction that occurred
between the barium chloride solution, BaCl,(aq), and the sodium sulfate solution,
Na SO (aq).
Word Equation:
Formula Equation:
2. (a) Which of the…
In the drawing areas below, draw the two most expected stable conformations of the following molecule:
ייון
Be sure your drawings make it possible to distinguish between the conformations.
After you've drawn the conformations, answer the question below the drawing areas.
Х
S
: ☐
☑
5
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