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A weather balloon’s temperature is lowered down from 58ºC to 30 OC. As a result, the gas inside the weather balloon decreases in volume. Which gas law explains this phenomenon?

Question

A weather balloon’s temperature is lowered down from 58ºC to 30 OC. As a result, the gas inside the weather balloon decreases in volume. Which gas law explains this phenomenon?

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Solution

The gas law that explains this phenomenon is Charles's Law. Charles's Law states that the volume of a given amount of gas is directly proportional to its temperature on the absolute scale (Kelvin scale) if pressure is kept constant.

Here are the steps to understand this:

  1. Charles's Law is usually stated as: V1/T1 = V2/T2, where V1 is the initial volume, T1 is the initial temperature, V2 is the final volume, and T2 is the final temperature.

  2. In this case, the temperature of the gas in the balloon decreases from 58ºC to 30ºC. According to Charles's Law, if the temperature of a gas decreases, its volume should also decrease, assuming the pressure remains constant.

  3. This is because the gas molecules move slower at lower temperatures and take up less space, causing the volume of the gas to decrease.

  4. Therefore, the decrease in volume of the gas inside the weather balloon when its temperature is lowered is explained by Charles's Law.

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