Question

“The stainless steel vessels in the kitchen have copper coating on the bottom.” Write scientific reasons.

Answer 1

Hint: The conductivity of heat is being compared between steel and copper. The better is the one which conducts heat quickly and is corrosion resistant.

Complete step by step answer:
The apparatus mostly used in the kitchen are stainless steel. Some of these apparatus which are used for cooking purposes have a copper base. The use of copper base has few advantages over the full steel utensils.
The answer to the question lies in two points. The first point is heat conduction and the second point is corrosion resistant.
-The copper coating on the bottom helps in the faster heat conduction. It is because copper is a good conductor of heat compared to steel. Due to this the food gets hot faster and the food gets ready quickly.
-The metallic copper does not undergo any reaction with water. Hence after use for several times the shape and durability of the container remain as such. But steel contains iron which on prolonged use under heating conditions gets deformed. Hence the copper bottom utensils are durable and corrosion resistant.
The reaction of copper with hot water is shown as
\[Cu(s) + {H_2}O \to no{\text{ }}product\]
The reaction of iron with hot water is shown as
\[3Fe(s) + 4{H_2}O \to F{e_3}{O_4}(s) + 4{H_2}(g)\]
The iron oxide thus produced by the reaction is known as iron (II) oxide and is a stable form of rust.

Note:
The tendency of metals to produce metal oxide in cases where metals and hot water are kept together is present in the metals. Generally aluminium, iron and zinc react with hot water steam but copper, silver and gold metals are resistant to hot water steam.