  We analyze image and spectral data from $\approx$365~ks of observations from
the {\it Chandra} X-ray Observatory of the nearby, edge-on starburst galaxy NGC
253 to constrain properties of the hot phase of the outflow. We focus our
analysis on the $-$1.1 to $+$0.63 kpc region of the outflow and define several
regions for spectral extraction where we determine best-fit temperatures and
metal abundances. We find that the temperatures and electron densities peak in
the central $\sim$250 pc region of the outflow and decrease with distance.
These temperature and density profiles are in disagreement with an adiabatic
spherically expanding starburst wind model and suggest the presence of
additional physics such as mass loading and non-spherical outflow geometry. Our
derived temperatures and densities yield few-Myr cooling times in the nuclear
region, which may imply that the hot gas can undergo bulk radiative cooling as
it escapes along the minor axis. Our metal abundances of O, Ne, Mg, Si, S, and
Fe all peak in the central region and decrease with distance along the outflow,
with the exception of Ne which maintains a flat distribution. The metal
abundances indicate significant dilution outside of the starburst region. We
also find estimates on the mass outflow rates which are
$2.8\:M_{\odot}/\rm{yr}$ in the northern outflow and $3.2\:M_{\odot}/\rm{yr}$
in the southern outflow. Additionally, we detect emission from charge exchange
and find it has a significant contribution ($20-42$\%) to the total broad-band
($0.5-7$ keV) X-ray emission in the central and southern regions of the
outflow.
