Which describes the enthalpy change associated with an endothermic reaction?

it is negative because the enthalpy of the products is greater than the enthalpy of the reactants.

it is positive because the enthalpy of the products is greater than the enthalpy of the reactants.

it is negative because the enthalpy of the reactants is greater than the enthalpy of the products.

it is positive because the enthalpy of the reactants is greater than the enthalpy of the products.

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.