Which action changes the identity of the substance referenced? Breaking an ice cube; running an electric current through copper; burning wood; melting gold.(I’m not sure what it means by substance referenced)

i believe it is c.) 1575 j.

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

може ли да зареждате повече информация, моля