E. Mark each description as an exothermic or endothermic reaction. (2 points) Description
Exothermic
Endothermic
A + heat → B
1
-ΔΗ
Energy diagram:
I
Energy of reactants
greater than energy of
products

the first case study is endothermic seeing as heat is absorbed

the second is endothermic

the third is exothermic seeing as heat of reactants is lower than heat of product hence indicating release of heat

fourth is endothermic because the energy of reactants is greater than the energy of product hence heat was absorbed in the reaction and not liberated

quartz

explanation:

it is a solid

explanation: