3 published verifications about water water ×
“Pure water boils at 100 degrees Celsius at sea level (standard atmospheric pressure).”
Authoritative reference sources support this statement as the standard boiling point of pure water at sea-level pressure. The exact thermodynamic value at 1 atm is slightly below 100.00 °C, but 100 °C is the accepted rounded value in general science and education. Differences involving 1 bar versus 1 atm are technical convention issues, not a practical refutation of the claim.
“Water has the chemical formula H2O.”
Authoritative chemistry sources uniformly identify water’s chemical formula as H2O. The claim matches the standard molecular composition of water: two hydrogen atoms bonded to one oxygen atom. Objections based on liquid-water behavior or hydrogen bonding do not change that formula.
“Water can simultaneously boil and freeze under specific pressure conditions.”
The claim is scientifically accurate. At water's triple point (~0.01°C and ~611 Pa), solid, liquid, and gas phases coexist in equilibrium, meaning the conditions for both boiling and freezing are simultaneously met. This is confirmed by NIST, peer-reviewed research, and multiple academic sources. The minor caveat: "simultaneously boil and freeze" slightly overstates the drama — it's thermodynamic equilibrium coexistence, not necessarily vigorous concurrent boiling and freezing — and the required pressure is just 0.6% of normal atmospheric pressure.