The 1st Problem

We start publishing the tasks!
This year we will publish one task in a few days. And the first one – “Chemical vacuum pump”

Suggest a system comprised of a sealed vessel with no moving mechanical parts and a mixture of compounds that is capable of creating vacuum under appropriate conditions by chemical reaction. The vessel should be loaded at STP (298 K, 1 bar) and the final pressure should be no more than 1 Pa. Explain how the vessel is loaded and reaction is initiated and estimate the final pressure in the system.