CN201955970U - Device for demonstrating relationship between boiling points and pressures of liquids - Google Patents
Device for demonstrating relationship between boiling points and pressures of liquids Download PDFInfo
- Publication number
- CN201955970U CN201955970U CN201120090703XU CN201120090703U CN201955970U CN 201955970 U CN201955970 U CN 201955970U CN 201120090703X U CN201120090703X U CN 201120090703XU CN 201120090703 U CN201120090703 U CN 201120090703U CN 201955970 U CN201955970 U CN 201955970U
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- boiling point
- rubber plug
- barometer
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Abstract
The utility model provides a device for demonstrating the relationship between boiling points and pressures of liquids, consisting of an iron support (1), a heater, a glass flask (7), a rubber plug (6), a thermometer (3) and an aeration pipe (5). The glass flask (7) is filled with liquid and arranged on the iron support (1); the heater is arranged under the glass flask (7) to heat the glass flask (7); the rubber plug (6) seals the mouth of the glass flask (7); the thermometer (3) extends into the glass flask (7) through the rubber plug (6), and the aeration pipe (5) penetrates through the rubber plug (6)and extends into the liquid level in the glass flask (7). The device is convenient for demonstrating the relationship between the boiling points and the pressures of the liquids in class, is visual in method, is clear and accurate in physical significance and has good effects.
Description
Technical field
The utility model relates to a kind of physics facility, relates in particular to a kind of apparatus for demonstrating that is used to demonstrate boiling point and pressure relation.
Background technology
Temperature during liquid boiling is boiling point, and boiling is liquid surface and the inner violent vaporization phenomenon that carries out simultaneously.The condition of liquid boiling is that the temperature of liquid reaches boiling point, and live body continues heat absorption simultaneously, and the feature of boiling is to have a large amount of bubbles to form and rise to liquid level rapidly from liquid internal to break.
The condition of liquid boiling is p0=p, and p0 is a liquid saturated air pressure at a certain temperature, and p is an ambient atmosphere pressure.When the liquid surface atmospheric pressure increased, boiling point increased, when the liquid surface atmospheric pressure reduces, and the corresponding reduction of boiling point.
Generally be by enumerating the simplified example in the life in physics teaching, the boiling point of prescribed liquid and the relation of pressure as " pressure cooker ", " not yet done egg is boiled on the plateau " etc., but the effect teaching is not remarkable.Can't be intuitively to the demonstration of the relation of boiling point of liquid and pressure, explain its physical significance.
Summary of the invention
The purpose of this utility model provides a kind of boiling point of liquid and pressure relation demonstration device, is convenient to carry out in the classroom demonstration of the relation of boiling point of liquid and pressure, and method is directly perceived, and the physical significance clear and definite is effective.
The purpose of this utility model is achieved through the following technical solutions:
A kind of boiling point of liquid and pressure relation demonstration device comprise: iron stand 1, add and hold device, glass flask 7, rubber plug 6, thermometer 3 and snorkel 5;
Described device also comprises U type pipe barometer 2, and an end of U type pipe barometer 2 stretches on the liquid level in the glass flask 7.
Described U type pipe barometer 2 is provided with glass valve 3.
Described well heater is a spirit lamp 8.
Described snorkel 5 is the L type.
The technical scheme that is provided by above-mentioned the utility model as can be seen, a kind of boiling point of liquid that the utility model embodiment provides and pressure relation demonstration device are convenient to the demonstration in the relation of classroom feed liquor body boiling point and pressure, and method is directly perceived, the physical significance clear and definite, effective.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skill in the art, under the prerequisite of not paying creative work, can also obtain other accompanying drawings according to these accompanying drawings.
The boiling point of liquid that Fig. 1 provides for the embodiment of the invention and the structural representation of pressure relation demonstration device.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on embodiment of the present utility model, those of ordinary skills belong to protection domain of the present utility model not making the every other embodiment that is obtained under the creative work prerequisite.
Below in conjunction with accompanying drawing the embodiment of the invention is described in further detail.
As shown in Figure 1, a kind of boiling point of liquid and pressure relation demonstration device comprise: iron stand 1, add and hold device, glass flask 7, rubber plug 6, thermometer 3 and snorkel 5;
Described device also comprises U type pipe barometer 2, and an end of U type pipe barometer 2 stretches on the liquid level in the glass flask 7.
Described U type pipe barometer 2 is provided with glass valve 3.
Described well heater uses spirit lamp 8 usually.Certainly the well heater that uses other also can, as electrically heated rod, electric furnace etc.
For convenience of inflating and bleeding, described snorkel 5 is the L type.
Experimental principle:
The first step, employing device shown in Figure 1, testing liquid (water) is put into glass flask 7, more than half approximately bottle is advisable, close glass valve 3, with spirit lamp 8 heating glass flasks 7, when being heated to a certain degree, having desultory minute bubbles and slowly outwards emerge, along with the further rising of temperature, the minute bubbles of outwards emerging will get more and more.When temperature reaches the boiling point of water, boiling phenomenon appears, and this chronothermometer is shown as 100 ℃ (they are example with 1 standard atmospheric pressure), piezometer both sides pressure reduction no change, promptly p0 is about 1 standard atmospheric pressure.Do not comprise that as device U type pipe barometer 2 does not influence the demonstration of this step.
Second goes on foot, inflates in glass flask 7 by snorkel 5 when liquid seethes with excitement, glass valve 3 is closed at this moment, can see that by U type pipe barometer 2 glass flask 7 pressure increase gradually, the water that is seething with excitement gradually stopped boiling, along with continuation heating such as alcohol, after a period of time, water seethes with excitement once more, can see that by thermometer 4 temperature is above 100 ℃, when being the increase of liquid surface pressure, boiling point increases.Do not comprise U type pipe barometer 2 as device, then that rain glass is set is also passable for the inflation end.
The 3rd step, unlatching glass valve 3 be not (as comprising U type pipe barometer 2, snorkel 5 is opened), remove spirit lamp 8, after treating that the water temperature reduction stops boiling, close glass valve 3, outwards bleed by glass flask 7 by snorkel 5, can see by U type pipe barometer 2, pressure reduces gradually in the glass flask 7, stopped the water that seething with excitement having come to life again gradually, temperature is lower than 100 ℃ in the time of can seeing boiling by thermometer 4, and when promptly liquid surface pressure reduced, boiling point decreased.Do not comprise U type pipe barometer 2 as device, then that rain glass is set is also passable for the inflation end.
The experiment of this device is visual in image, and the student is easy to accept.Can understand the relation of boiling point of liquid and pressure by experiment easily.
The above; it only is the preferable embodiment of the utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.
Claims (5)
1. boiling point of liquid and pressure relation demonstration device is characterized in that, comprising: iron stand (1), add and hold device, glass flask (7), rubber plug (6), thermometer (3) and snorkel (5);
Glass flask (7) contain fluid also places on the iron stand (1), well heater is positioned at glass flask (7) below glass flask (7) is heated, rubber plug (6) is sealed in glass flask (7) mouthful, and thermometer (3) passes rubber plug (6) and stretches in the liquid in the glass flask (7); Snorkel (5) passes rubber plug (6) and stretches on the liquid level in the glass flask (7).
2. boiling point of liquid according to claim 1 and pressure relation demonstration device is characterized in that described device also comprises U type pipe barometer (2), and an end of U type pipe barometer (2) stretches on the liquid level in the glass flask (7).
3. boiling point of liquid according to claim 2 and pressure relation demonstration device is characterized in that described U type pipe barometer (2) is provided with glass valve (3).
4. according to claim 1,2 or 3 described boiling point of liquid and pressure relation demonstration device, it is characterized in that described well heater is spirit lamp (8).
5. according to claim 1,2 or 3 described boiling point of liquid and pressure relation demonstration device, it is characterized in that described snorkel (5) is the L type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120090703XU CN201955970U (en) | 2011-03-30 | 2011-03-30 | Device for demonstrating relationship between boiling points and pressures of liquids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120090703XU CN201955970U (en) | 2011-03-30 | 2011-03-30 | Device for demonstrating relationship between boiling points and pressures of liquids |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201955970U true CN201955970U (en) | 2011-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120090703XU Expired - Fee Related CN201955970U (en) | 2011-03-30 | 2011-03-30 | Device for demonstrating relationship between boiling points and pressures of liquids |
Country Status (1)
| Country | Link |
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| CN (1) | CN201955970U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730045A (en) * | 2014-01-20 | 2014-04-16 | 西南大学 | Comprehensive demonstration instrument for studying gas discharge phenomenon and air pressure influence on liquid boiling points |
| CN104680895A (en) * | 2015-02-05 | 2015-06-03 | 四川科业教学仪器设备有限责任公司 | Teaching experimental device about influence of air pressure on boiling point |
| CN105810055A (en) * | 2016-05-26 | 2016-07-27 | 贾文程 | Device for demonstrating relationship between air pressure and boiling point |
| CN106448371A (en) * | 2016-11-03 | 2017-02-22 | 郭诺 | A physics teaching demonstration apparatus |
| CN109036027A (en) * | 2018-08-22 | 2018-12-18 | 胡玮桐 | A kind of boiling point and pressure intensity testing heating device of high school physics |
-
2011
- 2011-03-30 CN CN201120090703XU patent/CN201955970U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730045A (en) * | 2014-01-20 | 2014-04-16 | 西南大学 | Comprehensive demonstration instrument for studying gas discharge phenomenon and air pressure influence on liquid boiling points |
| CN103730045B (en) * | 2014-01-20 | 2015-09-30 | 西南大学 | Probe into the comprehensive demonstration instrument that gas discharge phenomenon and air pressure affect boiling point of liquid |
| CN104680895A (en) * | 2015-02-05 | 2015-06-03 | 四川科业教学仪器设备有限责任公司 | Teaching experimental device about influence of air pressure on boiling point |
| CN104680895B (en) * | 2015-02-05 | 2017-05-10 | 四川科业教学仪器设备有限责任公司 | Teaching experimental device about influence of air pressure on boiling point |
| CN105810055A (en) * | 2016-05-26 | 2016-07-27 | 贾文程 | Device for demonstrating relationship between air pressure and boiling point |
| CN106448371A (en) * | 2016-11-03 | 2017-02-22 | 郭诺 | A physics teaching demonstration apparatus |
| CN109036027A (en) * | 2018-08-22 | 2018-12-18 | 胡玮桐 | A kind of boiling point and pressure intensity testing heating device of high school physics |
| CN109036027B (en) * | 2018-08-22 | 2021-03-30 | 胡玮桐 | Heating device for boiling point and pressure intensity experiments of high school physics |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20120330 |