Question

Determine the boiling point of water at 620 mm Hg?

Answer 1

For example, at sea level the atmospheric pressure is 760 mm Hg (also expressed as 760 torr, 101325 Pa, 101.3 kPa, 1013.25 mbar or 14.696 psi) and pure water boils at 100°C. However, in Calgary (approx. 1050m above sea level) the atmospheric pressure is approximately 670 mm Hg, and water boils at about 96.6°C.

Answer 2

Answer: The boiling point of water at 620 mmHg is 81.58°C.

Explanation:

Boiling point is defined as the temperature at which liquid state starts to convert into gaseous state.

Boiling point of water at 1 atm pressure is 100°C

Converting 1 atm to mmHg, we use the conversion factor:

1 atm = 760 mmHg

To calculate the temperature at 620 mmHg, we apply unitary method:

At 760 mmHg, the boiling point of water is 100°C.

Then, at 620 mmHg, the boiling point of water will be = $\frac{100^oC}{760mmHg}\times 620mmHg=81.58^oC$

Hence, the boiling point of water at 620 mmHg is 81.58°C.