Table 11: Melting points, boiling points, molar heat capacity, and phase change enthalpies

Compound

Melting point
°C

Boiling point °C

Molar specific heat
Jˇ mol-1ˇ K-1

Melting enthalpy
Jˇ mol-1

Boiling enthalpy
Jˇ mol-1

He(g)

-272.2

-268.93

20.78

21.0

84.0

Ar(g)

-189.2

-185.7

20.78

1188.0

6280.0

H2(g)

-259.1

-252.7

28.7

58.6

345.0

O2(g)

-219.0

-183.0

29.32

444.8

6816.0

N2(g)

-210.0

-196.0

29.17

357.0

2800.0

Cl2(g)

-100.98

-34.6

33.82

6406.0

20360.0

Br2(l)

-7.2

58.78

75.56

10573.0

30460.0

I2

113.5

184.35

108.31

62470.0

42340.0

H2O(s)

0.0

-

37.62

6030

 
H2O(l)

-

0.0

75.86

-

 
H2O(l)

-

4.0

75.69

-

 
H2O(l)

-

100.0

75.89

-

40680.0

H2O(g)

-

-

36.14

-

 
CO2(g)

-56.6

-78.6

36.80

8330.0

25230.0*

NH3(g)

-77.7

-33.4

37.28

5653.0

23400.0

H2S(g)

-82.9

-59.6

 

2377.0

18670.0

Na

97.7

882.0

27.6

2599.0

98210.0

NaCl

801.0

1413.0

51.48

30361.5

 
Cu(s)

1084.0

-

24.59

13026.93

 
Cu(l)

-

2567.0

26.69

 

305656.26

Zn(s)

419.6

907

24.85

6539.0

115086.4

Bi(s)

271.3

1560.0

25.08

11284.94

 
Pb(s)

327.5

1740.0

26.52

4765.6

 
Ni(s)

1453.0

2732.0

26.06

18193.9

 
Hg(l)

-38.84

356.68

27.88

2346.9

58973.46

Ag(s)

961.9

2212

 

11300.0

254000.0

Al(s)

660.4

2467.0

24.28

10684.08

283290.0

CH4(g)

-182.0

-164.0

38.0

941.0

8180.0

C2H6(g)

-183.3

-88.6

-52.93

2860.0

14700.0

C2H4(g)

-169.0

-103.9

43.60

   
C2H2(g)

-81.5

-84.0

42.38

   
C6H6(g)

5.5

80.1

 

10590.0

30800.0

C2H5OH(g)

-114.6

78.26

 

4646.0

39422.0

* sublimation enthalpy