General Chemistry: Principles and Modern Applications (10th Edition)

It is not possible to achieve a temperature of -465 $^{\circ}$F, since this is lower than the absolute zero of temperature.
T($^{\circ}$C) = $\frac{5}{9}$ * [T($^{\circ}$F) - 32] T($^{\circ}$C) at -465 $^{\circ}$F: T($^{\circ}$C) = $\frac{5}{9}$ * [-465 - 32] T($^{\circ}$C) = $\frac{5}{9}$ * [-497] T($^{\circ}$C) = -276.1111111 $^{\circ}$C Rounding to 3 significant figures gives -276 $^{\circ}$C -276 $^{\circ}$C is lower than the absolute zero of temperature -273.15 $^{\circ}$C and therefore it is not possible to achieve a temperature of -465 $^{\circ}$F.