2007-11-02 08:20:48 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics
With lowered pressure Boiling Point lowers as well. Boiling occurs when vapor pressure is equivalent to the atmospheric pressure. Normally this would be 760 mm of Hg or 1 atm, but if pressure is lowered less energy is needed to make water boil. Hope that helps.
2007-11-02 08:24:55 · answer #1 · answered by Misanthropist 3 · 2⤊ 0⤋
The atmospheric pressure (air pressure) decreases as you go to higher altitudes. Air pressure affects the boiling temperature of water. At sea level (where the air pressure is 14.7 lbs/in²), water boils at 212°; but at 5000 ft. altitude (where the air pressure is only 12.2 lbs/in²), water boils at only 203°
2007-11-02 08:30:19 · answer #2 · answered by RickB 7 · 0⤊ 0⤋
with less pressure (air pressure) the molecules have less restrictiction to the vibration / expansion from heat. "boiling" being refered to the action - not the resulting temperature difference meaning steam may or may not also result from the "boiling" due to the reduced temp depending on the altitude.
2007-11-02 08:25:14 · answer #3 · answered by Dragon_Of_The_Claw 5 · 0⤊ 3⤋