On a humid day with 60% relative humidity and 25 oC, at what temperature willwater start to condense on a pair of glasses, given that the heat of vaporization forwater is 40.6 kJ/mol?a. 16 oCb. 19 oCc. 23 oCd. 28 oC
Question
On a humid day with 60% relative humidity and 25 oC, at what temperature willwater start to condense on a pair of glasses, given that the heat of vaporization forwater is 40.6 kJ/mol?a. 16 oCb. 19 oCc. 23 oCd. 28 oC
Solution
The question is asking for the dew point temperature, which is the temperature at which water vapor in the air begins to condense.
The dew point temperature can be calculated using the formula:
Tdp = T - ((100 - RH)/5)
where: Tdp = dew point temperature T = current temperature RH = relative humidity
Substituting the given values into the formula:
Tdp = 25 - ((100 - 60)/5) Tdp = 25 - (40/5) Tdp = 25 - 8 Tdp = 17°C
However, this is not an option in the multiple choice answers. The closest option to 17°C is 16°C, so the answer is a. 16°C.
Please note that this is a simplified calculation and actual dew point calculations can be more complex, taking into account factors such as atmospheric pressure.
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