It makes intuitive sense, too. For sound to travel through a medium, the constituent particles have to interact with their neighbors to keep the sound wave movi

It makes intuitive sense, too. For sound to travel through a medium, the constituent particles have to interact with their neighbors to keep the sound wave moving. In a liquid, the particles are much closer to their neighbors (on average) than in a gas at normal pressures. Because of this stronger coupling, the average liquid (or solid) should have a much higher speed of sound than the average gas.