Questions: collected over water at constant temperature? A) The measured pressure is greater than the pressure of dry hydrogen. B) The measured pressure is less than the pressure of dry hydrogen. C) The measured pressure is equal to the pressure of dry hydrogen. D) The measured pressure varies inversely with the pressure of dry hydrogen.

collected over water at constant temperature? A) The measured pressure is greater than the pressure of dry hydrogen. B) The measured pressure is less than the pressure of dry hydrogen. C) The measured pressure is equal to the pressure of dry hydrogen. D) The measured pressure varies inversely with the pressure of dry hydrogen.
Transcript text: collected over water at constant temperature? A) The measured pressure is greater than the pressure of dry hydrogen. B) The measured pressure is less than the pressure of dry hydrogen. C) The measured pressure is equal to the pressure of dry hydrogen. D) The measured pressure varies inversely with the pressure of dry hydrogen.
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Solution

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Solution Steps

Step 1: Understanding the Problem

When a gas is collected over water, it is mixed with water vapor. The total pressure measured is the sum of the pressure of the dry gas and the vapor pressure of water.

Step 2: Analyzing the Options
  • Option A: The measured pressure is greater than the pressure of dry hydrogen. This is true because the total pressure includes both the pressure of the dry hydrogen and the vapor pressure of water.
  • Option B: The measured pressure is less than the pressure of dry hydrogen. This is incorrect because the vapor pressure of water adds to the pressure of the dry hydrogen.
  • Option C: The measured pressure is equal to the pressure of dry hydrogen. This is incorrect because the vapor pressure of water contributes to the total pressure.
  • Option D: The measured pressure varies inversely with the pressure of dry hydrogen. This is incorrect because the vapor pressure of water is independent of the pressure of the dry hydrogen.

Final Answer

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