Which is a chemical change? o a. water boiling o b. wood burning o c. glass breaking o d. ice melting e. molding iron

B. Wood Burning

Explanation:

When you boil water, it is still water, just in vapor form

When glass breaks, it is still glass.

when frozen water (ice) melts, it is still water.

When you mold iron, it is still iron.

When you burn wood, it is not still wood. It is a new form of matter. It is ash.

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the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.