👉 In physics, the term "upboiling" refers to an increase in temperature and pressure of a liquid or gas when it is heated above its boiling point. This phenomenon occurs at high altitudes where temperatures can reach over 100 degrees Celsius (212 degrees Fahrenheit) and pressures can exceed the atmospheric pressure. The process of upboiling involves the rapid expansion of water vapor, steam, or other gaseous substances into a liquid state, which is then cooled down to its