Why is magnesium + copper sulphate → magnesium sulphate + copper a displacement reaction

Magnesium displaces copper from the solution of its salt (CuSO4)

Explanation:

Magnesium + copper sulphate → magnesium sulphate + copper

Mg(s) + CuSO4(aq) → MgSO4(aq) + Cu(s)

The balanced equation above is a displacement reaction because the more reactive magnesium metal displaces copper from its solution of its salt (CuSO4) due to its higher position in the reactivity series, hence Magnesium forms its own salt solution (MgSO4) while Copper is released in free form (Cu)

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.