i can't find my answer in the book or notes. and i need help, fast.
2006-10-31 16:00:46 · 10 answers · asked by lhoffm08 1 in Science & Mathematics ➔ Chemistry
Reduce the pressure.
Aloha
2006-10-31 16:02:44 · answer #1 · answered by Anonymous · 1⤊ 1⤋
by reducing the atmospheric pressure above the water surface. Boiling point occurs when the vapor pressure of the liquid equals the atmospheric pressure. That's how boiling point is defined.
2006-11-01 01:53:49 · answer #2 · answered by MrZ 6 · 0⤊ 0⤋
A liquid will boil when its vapor pressure equals the pressure above the liquid. For a given liquid at a given temperature, the vapor pressure is constant. In order to boil water at room temperature you must lower the pressure above the liquid until it equals water's vapor pressure at that temperature.
At 20 degrees C, pure water has a vapor pressure of 17.57 mmHg and at 25 degrees C, water has a vapor pressure of 23.76 mmHg, so a good estimate for water's vapor pressure at 20 degrees C would be about 20 mmHg.
20 mmHg is an incredibly low pressure. Converting this value to atmospheres we get a pressure of about .0263 atm (only about 2.6% of the normal atmospheric pressure on Earth at sea level) or about .387 psi or 2.67 kPa, so you can see that it is not easy to boil water at such a “low” temperature.
2006-11-01 00:19:41 · answer #3 · answered by mrjeffy321 7 · 1⤊ 1⤋
Water will boil at room temperature if the air pressure around it is decreased to a low enough level
2006-11-01 00:03:32 · answer #4 · answered by The Wired 4 · 1⤊ 1⤋
Enufwork is right. I live in the high altitude, where air pressure is higher, and it takes almost thirty minutes to boil some pasta!!!
Maybe Death Valley??
2006-11-01 00:06:38 · answer #5 · answered by demosthenes_04 2 · 0⤊ 2⤋
I saw my chemistry teacher do this in class. I know it has to do with making the air pressure incredibly low, like in a vacuum chamber.
2006-11-01 00:04:15 · answer #6 · answered by steven c 2 · 1⤊ 1⤋
bring down the pressure to about 5.6 kPa to boil at 22C.
2006-11-01 03:27:06 · answer #7 · answered by titanium007 4 · 0⤊ 0⤋
I bet there is phase transition diagram in your chemistry book.
2006-11-01 05:57:02 · answer #8 · answered by Anonymous · 0⤊ 0⤋
water wasnt made to boil at 22C'
The boiling point of water happens to be 22C'
2006-11-01 01:37:48 · answer #9 · answered by Rodney I 2 · 0⤊ 3⤋
increase the air pressure.
2006-11-01 00:06:04 · answer #10 · answered by Neo 2 · 0⤊ 2⤋