H°f(kJ/mol)G°f(kJ/mol)This program uses some mathemetical symbols, which may not display correctly
in all browsers. I have tested the programs in Microsoft Internet Explorer 4 and 5 and
Netscape 4.08. WSH
This program provides drill in calculations involving changes in free energy
and deciding if a process is spontaneous. The program will
show the correct solution for incorrect answers.
| Substance | H°f(kJ/mol) |
G°f(kJ/mol) |
S°f(J/K. mol) |
| Al(s) | 0 | 0 | 28.3 |
| Al2O3(s) | -1669.8 | -1576.4 | 50.99 |
| CH4(g) | -74.85 | -50.8 | 186.19 |
| CH3OH(l) | -238.6 | -166.2 | 127.0 |
| C2H4(g) | 52.47 | 68.36 | 219.22 |
| CO2(g) | -393.5 | -394.4 | 213.6 |
| CS2(g) | 115.3 | 65.1 | 237.8 |
| Cu(s) | 0 | 0 | 33.3 |
| CuO(s) | -155.2 | -127.2 | 43.5 |
| H2(g) | 0 | 0 | 130.6 |
| H2O(g) | -241.82 | -228.6 | 188.72 |
| H2O(l) | -285.84 | -237.19 | 69.94 |
| H2S(g) | -20.2 | -33 | 205.6 |
| O2(g) | 0 | 0 | 205.0 |
| Zn(s) | 0 | 0 | 41.6 |
| ZnO(s) | -348.0 | -318.2 | 43.9 |