Project ForgeThermodynamics
First Law of Thermodynamics
GATE 2021
Easy
The relative humidity of ambient air at 300 K is 50% with a partial pressure of water vapour equal to p_v. The saturation pressure of water at 300 K is p_sat. The correct relation for the air-water mixture is
- p_v = 0.5 p_sat
- Bp_v = p_sat
- Cp_v = 0.622 p_sat
- Dp_v = 2 p_sat
Explanation
By definition, relative humidity φ = p_v/p_sat. Given φ=50%=0.5, p_v = 0.5 p_sat.
Source: GATE ME 2021 Session 1 (ME-1) (2021)
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