Question

When a hot metal piece is left to cool in air the rate of cooling of the outer layer will be?

Answer 1

it depend on the metal temperature and the place temperature

Answer 2

The outer layer will slowly cool down and formation of rust starts.

• Whenever a hot piece of metal is subjected to sir for cooling down, it does cool down but also forms rust.
• The rust is formed on its outermost layer due to the reaction of metal with the air.
• The process of rusting is not too fast, it is a slow process.
• There would be no rusting in fewer cases depending on the temperature of the surrounding.