Help please this is for a test

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.

What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees celsius to a solid at the same temperature? melting point of substance y = 35 degrees c; δhvaporization = 3.67 j/mol; δhfusion = 3.30 j/mol. mwsubstance y = 28.22 g/mol. −12.4 j −3.51 x 102 j 1.24 x 101 j 351 j