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GATE Mechanical 2021 Set 1 | Question: 15

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​​​​​​​The relative humidity of ambient air at $\text{300 K}$ is $50\%$ with a partial pressure of water vapour equal to $p_{v}$. The saturation pressure of water at $\text{300 K}$ is $p_{sat}$. The correct relation for the air-water mixture is

  1. $p_{v}=0.5\:p_{sat}$
  2. $p_{v}=p_{sat}$
  3. $p_{v}=0.622\:p_{sat}$
  4. $p_{v}=2\:p_{sat}$
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