Order the following by increasing entropy.
CO(g) ,COCl₂(g) ,CO₂(g) ,CaO(s)

Question

Order the following by increasing entropy. CO(g),COCl₂(g),CO₂(g),CaO(s) A)CO₂ < CO < CaO < COCl₂ B)CaO < CO < CO₂ < COCl₂ C)COCl₂ < CO < CaO < CO₂ D)CO₂ < CaO < COCl₂ < CO E)CO < CaO < COCl₂ < CO₂

Quizplus · Accepted Answer

Entropy generally increases with increasing molecular complexity and decreasing intermolecular forces. CaO(s) is a solid with strong ionic bonds, therefore has a low entropy. CO(g) is a simple molecule with weak intermolecular forces, thus has higher entropy than CaO(s). CO₂(g) has a higher level of molecular complexity than CO and weaker forces than CaO, resulting in higher entropy. COCl₂(g) is the most complex molecule with the weakest intermolecular forces, giving it the highest entropy.

Order the Following by Increasing Entropy