Coffee contains volatile gases which must not be lost after roasting if the beans are to have a good nose.

Some of the decomposed material is released as volatile gases.

"Burning produces volatile gases that come off the wood," he said.

It is a matriarchal society with an unusually volatile gas.

Charcoal is wood that has been heated to remove nearly all of the volatile gases and leave behind the carbon.

Heat vaporizes gasoline and it all burns as a volatile gas.

The scientists use a meter to detect any volatile gases that might be in the sample.

It is a volatile gas at standard temperature and pressure with a boiling point of 12 C.

Just curious - does the model assume separate volumes of the volatile gas and air?

There could be some kind of extremely volatile gas involved.