WAEC - Physics (2011 - No. 19)
Which of the following assumptions is not valid for an ideal gas ?
molecules of a particular gas are identical
molecules moves freely throughout the volume of the container
force of attraction between molecules is negligible
molecules move at constant speed between collisions
Giải thích
In an ideal gas, molecules do not move at constant speed between collisions. Their speeds vary due to elastic collisions with other molecules and the walls of the container. The other assumptions—identical molecules, free movement throughout the container, and negligible forces of attraction—are valid for an ideal gas.