Would someone be able to help me with some chemistry problems about energy?

Question

1. A chemical reaction in which the products can regenerate the original reactants is a
a.forward reaction.
b.reaction rate.
c.reversible reaction.

2. Ninette wants to sweeten her iced tea. She looks in the restaurant's sugar dish and sees regular white granulated sugar and a packet of natural sugar. She opens each and sees that the natural sugar has very large crystals, much larger than the granulated sugar. Which sugar would be more likely to dissolve without Ninette having to stir the tea? Explain.

Answer 1

1. reversible reaction: This is called reversible because no effort is needed to change the product back into its reactants; it happens spontaneously. this is pretty common in organic reactions, in which usually a proton is being added or removed. Since this is relatively easy to do, it often is reversible.

2. Dissolveing is a surface reation, meaning that the reaction taking place only happens on the surface of the crystal where the crystal is making contact with the solution. therefore, more surface area (smaller crystals) would mean faster dissolving.