Question

Phosphorus pentachloride is introduced into an empty gas syringe which has a
movable, tightly fitting plunger. The gas is allowed to expand until equilibrium is reached at a temperature at which the phosphorus pentachloride partially dissociates.

Which statements are correct?
1) The equilibrium pressure inside the syringe will be greater than atmospheric pressure.
2) When the plunger is pushed in the equilibrium adjusts to produce more PCl5(g).
3) The volume of gas in the syringe at equilibrium will be greater than if no dissociation had
occurred.

I don't understand this question, why 2 and 3 are the only ones that are true?

Answer 1

Can you imagine a world without merchants, where we are left to our own devices to acquire goods and services without middlemen? Sounds like a harsh place to be. The sale and trade of goods defines much of the development and history of the world.

Please mark me as Brainlist I want only one Brainlist answer please.