CHEMISTRY GLOSSARY

Torr is obsolete unit of pressure. It is equal to the pressure exerted by a column of mercury one milimetre high, measured at 0 °C. The unit was named after the Italian physicist Evangelista Torricelli (1852-1908).

1 torr = 1 mmHg (0 °C)

760 torr = 1 atm

1 torr = (101 325/760) Pa