Which molecule based on the following enthalpies is the most stable?

Molecule A: -70 kJ/mol
Molecule B: 100 kJ/mol
Molecule C: 145 kJ/mol

Is it Molecule A? Isn't the lower the enthalpy the more stable the molecule?
Thank You

I believe you are right.

The enthalpy of a molecule can provide some insights into its stability, but it is not the sole factor in determining stability. In general, a lower enthalpy value indicates greater stability, as it suggests that less energy is required to break the bonds and convert the molecule into its constituent atoms.

So based solely on the enthalpies provided, Molecule A with an enthalpy of -70 kJ/mol would indeed appear to be the most stable. However, to accurately determine the stability of a molecule, we need to consider other factors such as bond strengths, electrostatic interactions, and molecular structure.

To further investigate the stability of these molecules, you could also consider their structures, resonance, and any other relevant properties. Additionally, it is important to note that stability can be influenced by external factors such as temperature and pressure.

In summary, while a lower enthalpy generally indicates greater stability, other factors should be considered to determine the overall stability of a molecule.