# R2 | deepseek/deepseek-v4-pro | run 1

## Prompt

What is the boiling point of water at sea level, in both Celsius and Fahrenheit? Cite a source.

## Response

At standard sea-level atmospheric pressure (1 atm / 101.325 kPa), water boils at **100 °C (212 °F)**. With greater thermodynamic precision, the number is 99.97 °C (211.95 °F) [wikipedia.org](https://en.wikipedia.org/wiki/Boiling_point?wprov=sfla1).

The small difference arises from the modern definition of the temperature scale. While the common definition rounds to 100 °C, the IUPAC-recommended standard boiling point at 100 kPa (1 bar) is 99.61 °C (211.3 °F). These variations are negligible for most everyday purposes.

Would you also like to know how the boiling point changes with altitude, or see a table for specific elevations?
