Basics
What does avogadro's Law state?
At constant temperature and pressure, volume is directly proportional to the number of moles.
A gas has 2 mol and 4 L. If it becomes 4 mol, what is the new volume?
8 L
What gas causes bread dough to rise?
Carbon Dioxide
According to KMT, are gas particles constantly moving?
Yes
Why must pressure stay constant in Avogadro’s Law?
Because pressure also affects volume.
If the number of moles doubles, what happens to the volume?
The volume doubles.
A balloon has 3 mol and 9 L. If it changes to 6 mol, what is the volume?
18 L
How does breathing relate to Avogadro’s Law?
More gas molecules entering the lungs increases lung volume.
According to KMT, gas particles are very close together. True or False?
false
Why must temperature stay constant?
Because temperature changes gas particle movement and volume.
What variables must stay constant in Avogadro’s Law?
Temperature and pressure.
A gas sample occupies 12 L with 4 mol. If the amount decreases to 2 mol, what is the new volume?
6 L
What everyday item expands because of gas production for birthdays?
Hint: our demo
The balloon.
Why can gases expand easily?
Because gas particles are far apart.
Explain why balloon volume increases when more gas is added.
More gas particles require more space.
What does “directly proportional” mean?
When one variable increases, the other increases by the same ratio.
A container has 5 mol and 20 L. If it changes to 10 mol, what happens to the volume?
40 L
Why do doctors use oxygen tanks?
To provide extra oxygen to patients who cannot get enough on their own.
What creates pressure in a gas?
Collisions between gas particles and the container walls.
A student says doubling moles always doubles pressure. Why is this incorrect?
In Avogadro’s Law, pressure stays constant and volume increases instead.
What unit is commonly used for amount of gas?
Moles (mol)
A gas occupies 15 L with 3 mol. If volume becomes 30 L, how many moles are present?
6 mol
What 2 kitchen items produce carbon dioxide gas?
Vinegar and baking soda
How does KMT support Avogadro’s Law?
Adding more gas particles increases the space needed, so volume increases.
Explain how baking demonstrates Avogadro’s Law.
Carbon dioxide gas produced during baking increases the volume of dough or batter.