Which of these processes indicates that smelting copper is a chemical change
a)it involves melting copper to form liquid metal
b)it involves heating charcoal to high tempuratures
c)it involves drawing copper into long wires
d)it involves breaking molecular bonds between copper compounds

Answer is d. The material can be phsycal changes into a differnt shape or state (gas, liquid, solid) and its will still be essentially copper. A chemical change is changing what other elements or compound is bonded to the copper atoms

Answer : option c) heat is released during the process.explanation :

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

Its trait is different and it the organism survive