The　compound　Mn1.1Fe0.9P0.76Ge0.24　has　been　studied　using　neutron　powder　diffraction　(NPD),　differential　scanning　calorimeter　(DSC),　and　magnetic　measurements,　in　order　to　clarify　the　nature　of　the　magnetic　and　structural　transition　and　measure　the　associated　entropy　change　(Delta　S).　The　strongly　first　order　transition　occurs　from　a　paramagnetic　(PM)　to　a　ferromagnetic　(FM)　phase　and　can　be　induced　either　by　temperature　or　by　an　applied　magnetic　field.　Our　investigations　indicate　that　the　two　processes　exhibit　identical　evolutions　regarding　the　crystal　and　magnetic　structures,　indicating　they　should　have　the　same　entropy　change.　We,　therefore,　conclude　that　the　Delta　S-DSC　obtained　by　the　DSC　method　(where　the　transition　is　temperature　induced)　is　valid　also　for　the　magnetically　induced　transition,　thus　avoiding　uncertainties　connected　with　the　magnetic　measurements.　We　have　obtained　the　Delta　S-DSC　=　33.8　J/kg　.　K　for　this　sample　upon　cooling,　which　would　increase　to　42.7　J/kg　.　K　for　a　impurity-free　and　completely　homogeneous　sample.　For　comparison,　the　magnetic　entropy　changes　(Delta　S-M)　induced　by　magnetic　field　and　calculated　using　the　Maxwell　relation　yields　a　Delta　S-M　=　46.5　J/kg　.　K,　38%　higher　than　DSDSC.　These　entropy　results　are　compared　and　discussed.　(C)　2013　American　Institute　of　Physics.　[http://dx.doi.org/10.1063/1.4788803]