# A container with thermally insulated walls contains oxygen at a very low pressureand temperature 300K. The volume of the container is V=1m3.

A container with thermally insulated walls contains oxygen at a very low pressureand temperature 300K. The volume of the container is V=1m3. After a small hole ispunctured in one of the walls, the gas begins to escape the container. [Note that smallnessof the hole and low pressure of the gas are necessary to justify the assumption that themolecules escape independently of one another]. There’s vacuum outside. The crosssectionarea of the hole is 1 mm2.A (10). Estimate the time it takes half of the initial amount of oxygen to escape assumingthat the temperature of the gas remains constantB (5). Do you think the constant temperature assumption is reasonable? If not, will thetemperature of the gas inside the container increase or decrease as the gas escapes?Explain your answer mathematically