Sl. No.

Properties

Hydrogen

1

Chemical Formula

H₂

2

Density at 1 atm and 300 K (kg/m³)

0.08

3

Calorific value (MJ/kg)

119.7

4

Cetane Number

-

5

Kinematic viscosity at 300 K (mm²/s)

110

6

Thermal conductivity at 300 K (W/mK)

182

7

Diffusion coefficient into air at NTP (cm²/s)

0.61

8

Boiling point (K)

20.27

9

Molecular weight (g/mole)

2.015

10

Combustion energy per kg of stoich. mixture (MJ)

3.37

11

Flammability limits (% by volume)

4 - 75

12

Flammability limits (Equivalence ratio)

0.1 - 6.9

13

Laminar flame speed at NTP (m/s)

1.9

14

Max deflagration speed (m/sec)

3.5

15

Minimum ignition energy (mJ)

0.02

16

Adiabatic flame temperature (K)

2318

17

Auto ignition temperature (K)

858