which ranks the gases in order of increasing average velocity?
H2<O2<Cl2<Xe
Xe<Cl2<O2<H2
O2=Cl2=H2<Xe
kinetic energy = 1/2 mv2
where m is mass and v is velocity. At the same temperature all of the gases will have the same kinetic energy. Therefore, the higher the mass the ????? the velocity and the lower the mass the ????? the velocity.
To determine the order of increasing average velocity of the gases, we need to consider the molar masses of the gases. The lighter the gas, the higher its average velocity.
First, let's compare H2 and O2. Hydrogen gas (H2) has a lower molar mass than oxygen gas (O2), so H2 will have a higher average velocity than O2. Therefore, we can eliminate answer choice B.
Next, let's compare Cl2 with both H2 and O2. Again, chlorine gas (Cl2) has a higher molar mass than both hydrogen gas (H2) and oxygen gas (O2). Therefore, Cl2 will have a lower average velocity than both H2 and O2. Thus, we can eliminate answer choices A and C.
Lastly, let's consider the position of xenon gas (Xe). Xenon gas has the highest molar mass among the given gases, making it the heaviest. Since it is heavier than all the other gases, Xe will have the lowest average velocity. Therefore, the correct order of increasing average velocity is:
Xe < Cl2 < O2 < H2
Thus, the correct answer is:
Xe < Cl2 < O2 < H2