Chem 2 Gas Laws 2

As temperature of a gas increases at constant volume... pressure...

• decreases
• remains constant
• increases
• fluctuates

Gases are always...

• only move in curved pathways

• in constant motion and fill their container
• always at rest and do not fill their container
• are heavier than liquids and solids

Tags

NGSS.MS-PS1-4

A balloon is squeezed, assuming the temperature does not change, what will happen to the pressure in the balloon?

• The pressure in the balloon will fluctuate.
• The pressure in the balloon will remain the same.
• The pressure in the balloon will increase.
• The pressure in the balloon will decrease.

When drinking from a straw, the pressure inside the straw compared to the outside is...

• higher than the outside pressure
• equal to the outside pressure
• lower than the outside pressure
• fluctuating with the outside pressure

A marshmallow - which is jet puffed with air - is heated over a flame and appears to expand. Which of the following is the best explanation as to why?

• The air inside the marshmallow expands when heated.
• The marshmallow absorbs moisture from the air, causing it to swell.
• The heat causes the sugar in the marshmallow to dissolve and shrink.
• The marshmallow is made of a gas that becomes liquid when heated.

Tags

NGSS.MS-PS1-4

A basketball appears to be "flat" when it is cold outside, this is because...

• The basketball absorbs moisture in cold weather, making it heavier.
• The air inside the basketball contracts in cold temperatures, reducing pressure and making it feel flat.
• Cold temperatures cause the rubber to harden, affecting its bounce.
• The air inside the basketball expands in cold temperatures, increasing pressure and making it feel flat.

A popcorn kernel expands and "pops" because the water inside turns into a vapor and...

• the kernel absorbs heat and shrinks.
• the pressure builds up until the kernel bursts open.
• the water evaporates and cools down.
• the pressure begins to drop until the kernel collapses inward.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Temperature (regarding gases) is ...

• a measure of the pressure exerted by gas molecules
• a measure of the total volume of gas
• a measure of the average speed of gas molecules

• a measure of the density of gas particles

Tags

NGSS.HS-PS3-2

Pressure of a gas is...

• The volume occupied by gas particles.
• The weight of gas particles in a container.
• The temperature of a gas in a closed system.
• The force exerted by gas particles per unit area.

Ideal gases do not have...

• fixed volume
• intermolecular forces
• low temperature
• high density