  We present an X-ray study of the galaxy group RGH 80, observed by XMM-Newton.
The X-ray emission of the gas is detected out to ~ 462h^{-1}_{50} kpc,
corresponding to ~ 0.45 r_{200}. The group is relatively gas rich and luminous
with respect to its temperature of 1.01 +/- 0.01 keV. Using the deprojected
spectral analysis, we find that the temperature peaks at ~ 1.3 keV around
0.11r_{200}, and then decreases inwards to 0.83 keV at the center and outwards
to ~ 70% of the peak value at large radii. Within the central ~ 60 kpc of the
group where the gas cooling time is less than the Hubble time, two-temperature
model with temperatures of 0.82 and 1.51 keV and the Galactic absorption gives
the best fit of the spectra, with ~ 20% volume occupied by the cool component.
We also derive the gas entropy distribution, which is consistent with the
prediction of cooling and/or internal heating models. Furthermore, the
abundances of O, Mg, Si, S, and Fe decrease monotonically with radius. With the
observed abundance ratio pattern, we estimate that ~ 85% or ~ 72% of the iron
mass is contributed by SN Ia, depending on the adopted SN II models.
