Calculate the energy (in Mev’s) released in the reaction:2/1H+3/1H—4/2He+1/on+E

Explanation:

1. Calculate the mass difference

 Mass of ₁²H = 2.014 102 u

 Mass of ₁³H = 3.016 049                      

              Total =                    5.030 151 u

Mass of  ₂⁴He = 4.002 603

   Mass of ₀¹n = 1.008 665                        

               Total =                    5.011 268    

     Difference =                     0.018 883 u

2. Convert the mass difference to energy.

931.5 MeV = 1 u

your answer would be “dry”

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.