Two students were conducting an experiment. They have two blocks of different metals and wanted to identify them. They started by attaching electrical nodes to each block to test for conductivity. Here are their results:

this dosen't make sense

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.