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Calculate temperature using vapor pressure

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Please explain the math as elementary as possible. Thanks.

The vapor pressure of Ethanol is 115 torr at 34.9EC If H sub vap = 40.5 kJ/mol, calculate the temperature (in EC) at which the vapor pressure is 760 torr.

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This solution is provided in an attached .doc file. It briefly gives an equation and uses this equation to find the temperature.

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Calculating formaldehyde losses (emissions) to atmosphere from a heated and open container of water?

Assume that you have a 1000L container of water open to atmosphere; the water is at an average year round temperature of 175 degrees F; the average ambient air temperature is 60 degrees F; and assume the static concentration of formaldehyde in the water is 100 mg/L.

How would I calculate the potential loss of formaldehyde to the atmosphere from this open heated container of water? My sense is that it would be a function of both water and air temperature plus the vapor pressure of the water and formaldehyde?? Also, would it actually be soluble formaldehyde in the water or would it be an organic acid precursor like acetic or formic acid?

Can you please walk me through the calculations so that I clearly understand?

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