What is the change in Enthalpy when 1 mol of Argon is cooled from 475 K to 233 K. Given That : Molar Heat Capacity of Argon (g) = 20.8 J/K mol

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

the answer is a and have a great day