Determine the boiling point of water at 698.5mm Hg.?

Answer 1

It's 208 F (97.8 C). Just convery 698.5 mm Hg into the different units (698.5/760 x 29.92).

Lowering pressure (760 mm Hg is atmospheric) to 698.5 mm Hg will obviously reduce the boiling point of water.

Answer 2

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RE:
Determine the boiling point of water at 698.5mm Hg.?

Answer 3

As long as a vessel of water is boiling at 760 mmHg, it will remain at 100°C
Answer is 97.6613

http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/vappre.html#c5Boiling Point Variation
The standard boiling point for water at 100°C is for standard atmospheric pressure, 760 mmHg. It is the experience of high altitude hikers that it takes longer to cook food at altitude because the boiling point of water is lower. On the other hand, food cooks more quickly in a pressure cooker because the boiling point is elevated. Raising or lowering the pressure by about 28 mmHg will change the boiling point by 1°C.

Although the vapor pressure variation with temperature is a non-linear one, the boiling point variation can be approximated near 100°C by an empirical fit of the available data. This can provide the following estimate of the boiling point:

For a pressure of mmHg
the boiling point will be approximately °C.

For variations in atmospheric pressure with altitude according to the barometric formula, the boiling point at a height of m = ft above sea level (atmos. pressure mmHg)
would be approximately °C.

Any of the data values above may be changed. The empirical calculation is valid only for a few degrees above and below the normal boiling point.
Notes: This calculation assumes an air temperature of 20°C and an average air molecule mass of 29 amu. The atmospheric pressure drops off a little faster with height when the air is colder, but the change is not large over the range of reasonable daytime temperatures. If you put in pressures above atmospheric pressure, you get reasonable boiling point values so long as you are within a few degrees of normal, but the negative altitude values you get are not valid.

Answer 4

100 Celsius degrees