Question

what is going to happen to a balloon filled with helium that is left in a car over night when the temperature drops approximately 20 degrees? (there are no holes in the balloon.)
○ the balloon is going to pop due to the increase in volume of the gas.
○ the balloon will be completely deflated due to the freezing of the gas.
○ the balloon is going to look somewhat deflated due to the decrease in volume.
○ nothing, the balloon will look the same. temperature change has no effect on gas volume.

Explanation:

This relates to Charles's Law, which states that for a fixed amount of gas at constant pressure, volume decreases as temperature decreases. A 20-degree drop is not enough to freeze helium (helium's boiling point is ~-269°C, far lower than typical overnight car temperatures), so the gas will only contract slightly, making the balloon somewhat deflated.

Answer:

The balloon is going to look somewhat deflated due to the decrease in volume.