I'm interested in enhancing the sterling motor. by using a vacuum to cause water to turn to ice thereby allowing for the contraction of the gas in the chamber. But I don't know if the water in the vacuum will stay cold when heat from the the gas is supplied to the vacuum packed container.
2007-04-07 15:56:53 · 9 answers · asked by carol s 2 in Science & Mathematics ➔ Physics
No. It turns to ice due to changes in pressure. Once the vacuum is established the pressure stabilizes and the ice will begin to absorb heat aound it and melt. With a good hard vacuum it will sublimate from ice directly to water vapor.
2007-04-07 16:01:55 · answer #1 · answered by Shane M 4 · 0⤊ 0⤋
The state that water is in depends on both its temperature and pressure. As you lower the pressure of the water,
i.e. bring it closer to a vacuum, the boiling point continually drops and the freezing stays relatively the same. Eventually the boiling and freezing point meet. This happens approximately at 612 Pa and 0°C. Standard atmospheric pressure is 101,325 Pa, and a vacuum is of course 0 Pa. If you drop the pressure below 612 Pa, then H2O is no longer stable as a liquid and can exist only as ice or steam.
2007-04-08 14:25:17 · answer #2 · answered by Jerry 3 · 0⤊ 1⤋
Water does not turn to ice in a vacuum. It turns to a gas. Besides, in a vacuum, there is no gas to contract in a chamber. And, the vacuum would not affect the temperature.
2007-04-07 23:01:56 · answer #3 · answered by Matthew P 4 · 0⤊ 1⤋
The freezing point is dependent on the air pressure. With zero air pressure (a vacuum) water will be a gas at any temperature.
2007-04-07 23:05:56 · answer #4 · answered by Demiurge42 7 · 0⤊ 0⤋
you mean it doesn't go straight to a gas state in a vacuum? boil in a cold steam, that's what i would assume.
2007-04-07 23:00:53 · answer #5 · answered by Anonymous · 0⤊ 1⤋
what gas. some gas under pressure gets real cold when released. nitrogen for example.
2007-04-07 23:01:23 · answer #6 · answered by Anonymous · 0⤊ 1⤋
yes
2007-04-07 23:02:09 · answer #7 · answered by gary s 1 · 0⤊ 1⤋
On what planet does this occur?
2007-04-07 23:08:14 · answer #8 · answered by Anonymous · 0⤊ 1⤋
it might i am not sure
2007-04-07 22:59:04 · answer #9 · answered by craigmcraken 1 · 0⤊ 1⤋