If a balloon is taken outside on a very cold day, what will occur?
A.
The volume of the balloon will decrease.
B.
Gas will flow into the balloon.
C.
The volume of the balloon will increase.
D.
The pressure inside the balloon will increase.
A. The volume of the balloon will decrease.
What would happen if a scuba tank (a rigid, sealed gas cylinder) heats up?
A.
The pressure exerted by the gas in the tank would increase.
B.
The size of the gas particles in the tank would increase.
C.
The number of particles in the tank would increase.
D.
The density of the gas in the tank would increase.
A. The volume of the balloon will decrease.
Explanation:
When a balloon is taken outside on a very cold day, the gas inside the balloon will cool down. As the gas cools, its particles slow down and occupy less volume. As a result, the volume of the balloon will decrease.
The correct answer is A. The volume of the balloon will decrease.
When a balloon is taken outside on a very cold day, the air inside the balloon cools down. As the temperature decreases, the kinetic energy of the air molecules also decreases. This causes the air molecules to slow down and move closer together.
According to Charles's Law, which describes the relationship between temperature and volume, when the temperature of a gas decreases, its volume decreases as well, assuming the pressure remains constant.
So, in this case, as the temperature outside gets colder, the air inside the balloon cools down, causing the air molecules to slow down and occupy less space. As a result, the volume of the balloon decreases.