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Suppose you had two identical jars, one containing air at 15°C and one containing air at 26°C. If both had relative humidity of 100%:Question 4Select one:More information is required to know which jar has more water vapourThe first jar would contain more water vapourThe second jar would contain more water vapourBoth jars would contain the same amount of water vapour

Question

Suppose you had two identical jars, one containing air at 15°C and one containing air at 26°C. If both had relative humidity of 100%:Question 4Select one:More information is required to know which jar has more water vapourThe first jar would contain more water vapourThe second jar would contain more water vapourBoth jars would contain the same amount of water vapour

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Solution

The second jar would contain more water vapour.

Here's why: Relative humidity is the amount of moisture in the air compared to the maximum amount of moisture the air could hold at that temperature. Warmer air can hold more moisture than cooler air. So, if both jars have a relative humidity of 100%, it means both jars are holding the maximum amount of moisture they can at their respective temperatures. Since 26°C is warmer than 15°C, the air in the second jar can hold more moisture, and thus would contain more water vapour.

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