Question

4 Give reasons for the following:
1. Even though rusting is an exothermic reaction, the heat evolved when an iron nail
rusts is unnoticeable​

Answer 1

Answer:

Rusting of iron – the reaction is slow and the heat evolved is very less, hence unnoticeable. Electrolytic decomposition of water is a reaction involving change of state

Answer 2

Answer:

Even though rusting is an exothermic reaction, the heat evolved when an iron nail rusts is unnoticeable. Answer: Rusting of iron – the reaction is slow and the heat evolved is very less, hence unnoticeable. Electrolytic decomposition of water is a reaction involving change of state.