A mixture of gases is heated and rises to the top of its container. Which statement best explains this result?

Answer 1

The result can be best explained by the principle of buoyancy. When a mixture of gases is heated, the molecules gain kinetic energy and move around more rapidly. As a result, the overall volume of the gas increases, causing it to become less dense than the surrounding air. According to Archimedes' principle, less dense objects will float in denser fluids. Therefore, the heated gas mixture, being less dense, will rise to the top of its container.