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Title: PLEASE HELP ME with my AP CHemistry PRoblem? Post by: oblinger on Aug 22, 2012 A sample of helium gas, initially at standard temperature and pressure, is compressed to a smaller volume at constant temperature. What happens to the average speed of the gas molecules?
a. It remains constant. b. It increases. c. It decreases. I am not sure if the volume really affects the speed, so I went with A. Title: PLEASE HELP ME with my AP CHemistry PRoblem? Post by: fisher 2012 on Aug 22, 2012 Content hidden
Title: PLEASE HELP ME with my AP CHemistry PRoblem? Post by: oblivious122 on Aug 22, 2012 Well speed is determined by temperature, so yes I believe A. is correct.
Title: PLEASE HELP ME with my AP CHemistry PRoblem? Post by: tom on Aug 22, 2012 If the volume is smaller, there will be more pressure because of more collisions of the atoms on the side of the container.
Title: PLEASE HELP ME with my AP CHemistry PRoblem? Post by: FISH0818 on Aug 22, 2012 temperature measures the average kinetic energy of the molecules
so if temp is unchanged then avg KE is unchanged and since KE = 1/2*m*v^2 and there is no mass change I gotta go with a) |