2. Identify each of the following changes as chemical or physical by placing a Chemical or Physical in each blank. a) acid rain comoding the statue of liberty d) melting steel b) dissolving salt in water e) dissolving steel in acid c) boiling salt water until just salt remains + cracking ice

Chemical

a) acid rain corroding the statue of liberty

e) dissolving steel in acid

the rest are physical changes

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.