Given the following data 2 ClF ( g ) + O 2 ( g ) → Cl 2 O ( g ) + F 2 O ( g ) Δ H = 167.4 KJ 2 ClF 3 ( g ) + 2 O 2 ( g ) → Cl 2 O ( g ) + 3 F 2 O ( g ) Δ H = 341.4 KJ 2 F 2 ( g ) + O 2 ( g ) → 2 F 2 O ( g ) Δ H = − 43.4 KJ Calculate ∆ H for the reaction ClF ( g ) + F 2 ( g ) → ClF 3 ( g )
Given the following data 2 ClF ( g ) + O 2 ( g ) → Cl 2 O ( g ) + F 2 O ( g ) Δ H = 167.4 KJ 2 ClF 3 ( g ) + 2 O 2 ( g ) → Cl 2 O ( g ) + 3 F 2 O ( g ) Δ H = 341.4 KJ 2 F 2 ( g ) + O 2 ( g ) → 2 F 2 O ( g ) Δ H = − 43.4 KJ Calculate ∆ H for the reaction ClF ( g ) + F 2 ( g ) → ClF 3 ( g )
Solution Summary: The author explains that the enthalpy change of a chemical is self-determining of the route by which the chemical reaction occurs.
2
ClF
(
g
)
+
O
2
(
g
)
→
Cl
2
O
(
g
)
+
F
2
O
(
g
)
Δ
H
=
167.4
KJ
2
ClF
3
(
g
)
+
2
O
2
(
g
)
→
Cl
2
O
(
g
)
+
3
F
2
O
(
g
)
Δ
H
=
341.4
KJ
2
F
2
(
g
)
+
O
2
(
g
)
→
2
F
2
O
(
g
)
Δ
H
=
−
43.4
KJ
Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C.
Mg(s) ∣ Mg2+(aq, 2.74 M) || Cu2+(aq, 0.0033 M) ∣ Cu(s)
Calculate E° for Ni(glycine)2 + 2e– D Ni + 2 glycine– given
Ni2+ + 2 glycine– D Ni(glycine)2 K = 1.2×1011
Ni2+ + 2 e– D Ni E° = -0.236 V
One method for the analysis of Fe3+, which is used with a variety of sample matrices, is to form the highly colored Fe3+–thioglycolic acid complex. The complex absorbs strongly at 535 nm. Standardizing the method is accomplished using external standards. A 10.00-ppm Fe3+ working standard is prepared by transferring a 10-mL aliquot of a 100.0 ppm stock solution of Fe3+ to a 100-mL volumetric flask and diluting to volume. Calibration standards of 1.00, 2.00, 3.00, 4.00, and 5.00 ppm are prepared by transferring appropriate amounts of the 10.0 ppm working solution into separate 50-mL volumetric flasks, each of which contains 5 mL of thioglycolic acid, 2 mL of 20% w/v ammonium citrate, and 5 mL of 0.22 M NH3. After diluting to volume and mixing, the absorbances of the external standards are measured against an appropriate blank. Samples are prepared for analysis by taking a portion known to contain approximately 0.1 g of Fe3+, dissolving it in a minimum amount of HNO3, and diluting to…
Chapter 7 Solutions
Bundle: Chemistry: An Atoms First Approach, Loose-leaf Version, 2nd + OWLv2 with Student Solutions Manual, 4 terms (24 months) Printed Access Card
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