Two reactant particles collide with proper orientation. The collision will be effective if the particles have (A) sufficient potential energy
(B) high activation energy
(C) high ionization energy
(D) sufficient kinetic energy

And explain why, and answer in

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)