Two sealed containers of equal volume hold the same number of molecules of the same gas. The diagrams represent the particles in each container. The gas at ...
Question 1 Report
Two sealed containers of equal volume hold the same number of molecules of the same gas. The diagrams represent the particles in each container. The gas at 600 K has longer arrows. What do the longer arrows represent?
Answer Details
The diagram shows two sealed containers of equal volume, each holding the same number of gas molecules. The gas at 300 K has short arrows attached to each particle, while the gas at 600 K has longer arrows. In kinetic particle diagrams, arrows represent the velocity (speed and direction) of the particles.
Temperature is a measure of the average kinetic energy of the particles. Since kinetic energy depends on speed (\(E_k = \frac{1}{2}mv^2\)), a higher temperature means the particles have a greater average speed. The longer arrows at 600 K represent this greater average speed.
The arrows do not represent particle size (particles do not change size with temperature) or spacing (the containers have equal volume and equal numbers of particles). Nor do they indicate more particles, since the question states both containers hold the same number. The longer arrows specifically show that the particles move faster on average at the higher temperature.
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