For the change $H_2O_{(l)} \to H_2O_{(g)}$ at $P = 1 \ atm$ and $T = 373 \ K$,the free energy change $\Delta G = 0$. This indicates that:
- A$H_2O_{(l)}$ is in equilibrium with $H_2O_{(g)}$
- BWater boils spontaneously at $373 \ K$
- CWater does not boil spontaneously at $373 \ K$
- DCondensation of water vapour occurs spontaneously at $373 \ K$
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