Question

reaction becomes hot when al is mixed with dilute HCl​

Answer 1

ANSWER

Metal + Acid-) Respective salt+ hydrogen

2Al+ 6HCl----) 2AlCl3 + 3H2

Remember that,

Acids react with metals, metal oxides, metal hydroxides and metal carbonates. During each of these reaction a salt is made.

hope it helps ✔️

Answer 2

Answer:

It is an exothermic reaction

Explanation:

Al + conc.HCl ----- AlCl3 + H2 + energy

this energy liberated during the process is the cause of the reaction to become hot