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A box of gas contains a mixture of two different gases, shown in the figure as blue molecules and red molecules. The temperature and pressure in the box are measured at STP (T = 300 K and p = 1 atmosphere). The blue molecules have 4 times the mass of the red molecules, but there are equal numbers of each kind in the box.
A. Which molecules contribute more to the pressure measured by a meter in the wall of the box?
- The blue molecules
- The red molecules
- They contribute equally.
- You cannot tell from the information given.
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B. Which molecules are moving faster?
- On average, the blue molecules are moving twice as fast as the red.
- On average, the red molecules are moving twice as fast as the blue.
- On average, the blue molecules are moving faster than the red but not twice as fast.
- On average, the red molecules are moving faster than the blue but not twice as fast.
- You can’t tell from the information given.
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