Question

part e could this chemical reaction be used for a cold pack? justify your answer.

Explanation:

Cold packs work by endothermic reactions which absorb heat from the surroundings. If the given chemical reaction is endothermic (absorbs heat), it could be used for a cold - pack. If it is exothermic (releases heat), it cannot be used for a cold - pack. We would need to know if the reaction absorbs or releases heat, for example by looking at the enthalpy change ($\Delta H$). If $\Delta H> 0$, it is endothermic and suitable; if $\Delta H < 0$, it is exothermic and not suitable.

Answer:

It depends on whether the chemical reaction is endothermic or exothermic. If endothermic, yes; if exothermic, no.