The dew point is the temperature at which moist air becomes saturated with water

Question

The dew point is the temperature at which moist air becomes saturated with water vapor. We can therefore represent how moist a particular parcel of air is by comparing its actual temperature with its dew point temperature.

We see the practical effect of reaching the dew point when on a cold day, we "see our breath" when we exhale.

Suppose it is -10 degrees Celsius outside and our breath leaves our body at 30 degrees Celsius, whereupon it mixes with the outside cold air in a one to one ratio (equal parts warm breath and cold air).

If your breath has sufficient moisture to have a dew point of 24 °C and the outside air has a dew point of -14 °C, will we be able to see our breath after it mixes with the cold outside air?

please show all your work MATHEMATICALLY. thank you

Explanation / Answer

Flash Point: 121 ° F (NTP, 1992)

Lower Explosive Limit (LEL): 2.9 % (NTP, 1992)

Upper Explosive Limit (UEL): 10.3 % (NTP, 1992)

Autoignition Temperature: 626 ° F (USCG, 1999)

Melting Point: -99.6 ° F (NTP, 1992)

Vapor Pressure: 10 mm Hg at 96.8 ° F (NTP, 1992)

Vapor Density (Relative to Air): 3.52 (NTP, 1992)

Specific Gravity: 1.08 (USCG, 1999)

Boiling Point: 283.19 ° F at 760 mm Hg (NTP, 1992)

Molecular Weight: 102.09 (NTP, 1992)

Water Solubility: Soluble in cold (greater than or equal to 10mg/ml); Decomposes in hot (NTP, 1992)

Ionization Potential: 10.00 eV (NIOSH, 2016)

IDLH: 200 ppm (NIOSH, 2016)

> indicates greater than.

Answers:10

• C4H6O3

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