1
2O ( g) 2(g) 2 ( g) 2H 2H + O
3O 2O 2 3
1 2 v c 2
1 1 2 v c 2
*
2 1991 9 26 3.15 3800 4 4 8 2
Kelvin scale
4 0.10 60 1993 12 250K 1
1 1 0.6 1 0.2 0.007 142 3