Dipotassium diiodide

Formula: I₂K₂
Molecular weight: 332.0055
IUPAC Standard InChI: InChI=1S/2HI.2K/h2*1H;;/q;;2*+1/p-2
IUPAC Standard InChIKey: HIEFXWXCLCHBPG-UHFFFAOYSA-L
CAS Registry Number: 12285-99-3
Chemical structure:
This structure is also available as a 2d Mol file
Permanent link for this species. Use this link for bookmarking this species for future reference.
Information on this page:
Other data available:
- Gas phase thermochemistry data
- Gas phase ion energetics data
Options:
- Switch to calorie-based units

Gas Phase Heat Capacity (Shomate Equation)

C_p° = A + B*t + C*t² + D*t³ + E/t²
H° − H°_298.15= A*t + B*t²/2 + C*t³/3 + D*t⁴/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t²/2 + D*t³/3 − E/(2*t²) + G
C_p = heat capacity (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.

View plot Requires a JavaScript / HTML 5 canvas capable browser.

Temperature (K)	298. - 6000.
A	83.13985
B	0.003864
C	-0.001055
D	0.000091
E	-0.078562
F	-447.2194
G	495.9421
H	-422.1656
Reference	Chase, 1998
Comment	Data last reviewed in June, 1967

Temperature (K)	C_p (J/mol*K)	S° (J/mol*K)	-(G° - H°_298.15)/T (J/mol*K)	H° - H°_298.15 (kJ/mol)
298.	82.26	395.7	395.8	-0.01
300.	82.27	396.3	395.8	0.15
400.	82.65	420.0	399.0	8.40
500.	82.83	438.5	405.1	16.67
600.	82.92	453.6	412.0	24.96
700.	82.98	466.4	418.9	33.26
800.	83.02	477.5	425.5	41.56
900.	83.05	487.2	431.8	49.86
1000.	83.06	496.0	437.8	58.17
1100.	83.08	503.9	443.5	66.47
1200.	83.09	511.1	448.8	74.78
1300.	83.10	517.8	453.9	83.09
1400.	83.10	523.9	458.7	91.40
1500.	83.11	529.7	463.2	99.71
1600.	83.11	535.0	467.5	108.0
1700.	83.12	540.1	471.6	116.3
1800.	83.12	544.8	475.6	124.6
1900.	83.12	549.3	479.3	133.0
2000.	83.12	553.6	483.0	141.3
2100.	83.13	557.6	486.4	149.6
2200.	83.13	561.5	489.7	157.9
2300.	83.13	565.2	492.9	166.2
2400.	83.13	568.7	496.0	174.5
2500.	83.13	572.1	499.0	182.8
2600.	83.13	575.4	501.9	191.1
2700.	83.13	578.5	504.7	199.5
2800.	83.13	581.6	507.4	207.8
2900.	83.14	584.5	510.0	216.1
3000.	83.14	587.3	512.5	224.4
3100.	83.14	590.0	514.9	232.7
3200.	83.14	592.7	517.3	241.0
3300.	83.14	595.2	519.7	249.3
3400.	83.14	597.7	521.9	257.7
3500.	83.14	600.1	524.1	266.0
3600.	83.14	602.5	526.3	274.3
3700.	83.14	604.7	528.4	282.6
3800.	83.14	606.9	530.4	290.9
3900.	83.14	609.1	532.4	299.2
4000.	83.14	611.2	534.3	307.5
4100.	83.14	613.3	536.2	315.9
4200.	83.14	615.3	538.1	324.2
4300.	83.14	617.2	539.9	332.5
4400.	83.14	619.1	541.7	340.8
4500.	83.14	621.0	543.4	349.1
4600.	83.14	622.8	545.1	357.4
4700.	83.14	624.6	546.8	365.7
4800.	83.14	626.4	548.4	374.1
4900.	83.14	628.1	550.0	382.4
5000.	83.14	629.8	551.6	390.7
5100.	83.14	631.4	553.2	399.0
5200.	83.14	633.0	554.7	407.3
5300.	83.14	634.6	556.2	415.6
5400.	83.14	636.2	557.7	423.9
5500.	83.14	637.7	559.1	432.3
5600.	83.14	639.2	560.5	440.6
5700.	83.14	640.7	561.9	448.9
5800.	83.14	642.1	563.3	457.2
5900.	83.14	643.5	564.6	465.5
6000.	83.14	644.9	566.0	473.8

References

Go To: Top, Gas Phase Heat Capacity (Shomate Equation), Notes

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Notes

Go To: Top, Gas Phase Heat Capacity (Shomate Equation), References

Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
Customer support for NIST Standard Reference Data products.