Which is the best description of activation energy? a. heat added to start a reaction
b. heat released as the reaction proceeds
c. heat stored within the reactant molecules
d. heat stored within the product molecules

A

Explanation:

Activation energy is the amount of energy required to reach the transition state, so A would seem like the best fit, because the heat is being ADDED to reach the state. (in this situation, starting the reaction)

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.

your answer should be c) enjoy!