At $298.15 \mathrm{~K}, \Delta G_f^{\circ}(\mathrm{HCOOH}, g)=-351.0 \mathrm{~kJ} \mathrm{~mol}^{-1}$ and $\Delta G_f^{\circ}(\mathrm{HCOOH}, l)=-361.4 \mathrm{~kJ} \mathrm{~mol}^{-1}$. Calculate the vapor pressure of formic acid at this temperature.
1.51