What is its molar heat of vaporization in kilojoules per mole if its vapor pressure at 20°C is 11.0 torr?

H.vap = 6.544 kJ/mol

Explanation:

Clausius-Clapeyron Equation

In P = H.vap / RT where T = 20 + 273 = 293K

H.vap = In P (RT) = In 11 (8.314 x 293) = 6543.861 J/mol = 6.544 kJ/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).