自じ由ゆう膨ぼう張ちょう

noun

free expansion

Physics term for the expansion of a gas into a vacuum without doing work.

• 自じ由ゆう膨ぼう張ちょうでは、気き体たいは外がい部ぶに仕し事ごとをしない。

  In free expansion, the gas does no work on the surroundings.