Sorry Charlie (Charles's Law)

What is the initial volume, V₁, of the Happy Birthday balloon filled with three breaths of air?

• 200 mL

• 400 mL

• 600 mL

• 800 mL

Answer explanation

The initial volume, V1, of the Happy Birthday balloon filled with three breaths of air is 400 mL, as each breath fills 133 mL (400 mL / 3 breaths = 133.33 mL per breath).

What is the initial temperature, T₁, of the air in the Happy Birthday balloon?

• 285 K

• 265 K

• 300 K

• 250 K

Answer explanation

The initial temperature, T₁, of the air in the Happy Birthday balloon is 285 K, as indicated in the correct answer choice.

After cooling, what is the new temperature, T₂, of the air in the Happy Birthday balloon?

• 285 K

• 265 K

• 300 K

• 250 K

Answer explanation

The correct answer is 265 K because the air in the balloon cools down, leading to a lower temperature than the initial 300 K.

What is the final temperature, T₃, of the air in the Happy Birthday balloon after it is heated?

• 285 K

• 265 K

• 300 K

• 250 K

Answer explanation

The correct final temperature, T₃, of the air in the Happy Birthday balloon after it is heated is 300 K, as indicated in the answer choices.

What is the initial volume, V₁, of the New Year's balloon when inflated with five breaths of air?

• 200 mL

• 400 mL

• 600 mL

• 800 mL

Answer explanation

The initial volume, V1, of the New Year's balloon when inflated with five breaths of air is 600 mL, as stated in the correct answer choice.

What is the volume, V₂, of the New Year's balloon after it is heated to a new temperature?

• 600 mL

• 630 mL

• 660 mL

• 690 mL

Answer explanation

The correct volume of the New Year's balloon after heating is 630 mL, as stated in the answer choices. Therefore, the correct answer is 630 mL.

What is the initial temperature, T₁, of the air in the New Year's balloon?

• 285 K

• 265 K

• 300 K

• 250 K

Answer explanation

The initial temperature, T1, of the air in the New Year's balloon is 285 K, as indicated in the correct answer choice.

After the New Year's balloon is cooled, what is the new temperature, T₃?

• 285 K

• 265 K

• 300 K

• 250 K

Answer explanation

The new temperature, T3, after cooling the New Year's balloon is 265 K as per the given correct answer choice.

According to Charles's Law, the volume of a gas is proportional to its temperature in which scale?

• Fahrenheit

• Celsius

• Kelvin

• Rankine

Answer explanation

According to Charles's Law, the volume of a gas is proportional to its temperature in Kelvin scale.

Is the volume of a gas proportional to its temperature in degrees Celsius?

• Yes, it is proportional.

• No, it is not proportional.

• It is only proportional at high temperatures.

• It is only proportional at low temperatures.

Answer explanation

The correct answer is 'No, it is not proportional.' The volume of a gas is not directly proportional to its temperature in degrees Celsius.