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To make water boil at 90°C, the method is () because the boiling point of liquid is lower at () and higher at ()
Decrease in pressure, decrease in pressure, increase in pressure
You don't have to have gas. Just change the pressure
At standard atmospheric pressure, the melting point of oxygen is -218°C and the boiling point is -183°C, so what is the state of oxygen at -220°C? What is the state of oxygen at 0.0°C? Write a reason, At standard atmospheric pressure, the melting point of oxygen is -218°C and the boiling point is -183°C, so what is the state of oxygen at -220°C? What is the state of oxygen at 0°C? Write a reason,
Below melting point: solid
Above melting point and below boiling point: liquid
Above boiling point: gaseous
-220°C below the melting point of oxygen, which is solid
0°C higher than the boiling point of oxygen, which is gaseous
RELATED INFORMATIONS
- 1. The following table shows the melting point and boiling point of several substances at standard atmospheric pressure. According to the data in the table, the following statements are correct:() The following table shows the melting point and boiling point of several substances under standard atmospheric pressure. According to the data in the table, the following statements are correct: () Melting point of lead:328°C; boiling point:1740°C Melting point of mercury:-38.8°C; boiling point:357°C Melting point of alcohol:-117°C; boiling point:78°C Melting point of toluene:-95°C; boiling point:111°C A. Lead in solid-liquid coexistence at 350°C B. Solid alcohol and toluene are not crystals C. Mercury thermometer can not be used to measure temperature in Huzhou area D. Boiling water temperature can not be measured by alcohol thermometer in Lake State area Why,
- 2. Boiling and melting points of iodine at standard atmospheric pressure
- 3. How does the boiling point of water change with altitude?
- 4. How many degrees does the boiling point of water drop? How many degrees does the boiling point of water drop when the altitude rises 1000 meters?
- 5. How to lower the boiling point of water
- 6. Should we increase or decrease the pressure to lower the boiling point of water?
- 7. How does the boiling point of water change if a small amount of NaCl solid is added to the water under atmospheric pressure There is still a paragraph on the subject The process of water changing from liquid to gas can be expressed by the following formula: H2O (l)=H2O (g) In this case, for example, the vaporization of H2O is endothermic, so the temperature rise balance moves in the direction of generating more H2O (g How does the boiling point of water change if a small amount of NaCl solid is added to the water under atmospheric pressure There is still a paragraph on the subject The process of water changing from liquid to gas can be expressed by the following formula: H2O (l)=H2O (g) In this case, for example, the vaporization of H2O is endothermic, so the temperature rise equilibrium moves in the direction in which more H2O (g) is generated
- 8. Why is the boiling point of brine higher than water?
- 9. Why can the temperature of water exceed the boiling point? RT, by the way, I want to ask why the temperature of water vapor can reach 2000+?
- 10. What is the boiling point of water
- 11. At this time, the boiling point of water is 100°C. When the water in the beaker is boiling, it will continue to be heated. Can the water in the test tube reach 100°C? Can it boil? Why? If the test tube is filled with alcohol, can the alcohol in the test tube boil? Why?
- 12. At standard atmospheric pressure, the boiling point of liquid oxygen is -183°C, the boiling point of liquid nitrogen is -196°C, and the boiling point of liquid helium is -268.9°C.
- 13. The temperature at which the liquid boils is called the boiling point. What does it have to do with the level?
- 14. The temperature at which a liquid boils is called the boiling point. The boiling point of a liquid is related to ().() The boiling point increases and () the boiling point decreases
- 15. When the boiling point of water greater than or less than a standard atmospheric pressure is lower than a standard atmospheric pressure
- 16. How to make the boiling point of water reach 100°C without standard atmospheric pressure Specific material steps except pressure cooker
- 17. Since the boiling point of water is 98 degrees Celsius, the atmospheric pressure () standard atmospheric pressure can be determined (Fill above, equal to or below)
- 18. At 1 standard atmospheric pressure, the boiling points of alcohol and water are 78°C and 100°C, respectively. Place them in two tubes and place them in boiling water under constant heating. Then, the boiling point of the two tubes is ______. At 1 standard atmospheric pressure, the boiling points of alcohol and water are 78°C and 100°C, respectively. Place them in two tubes and place them in boiling water under constant heating. Then, the boiling point in these two tubes is ______.
- 19. Can the temperature of the liquid exceed the boiling point at standard atmospheric pressure? Doesn't the boiling point of the liquid change? Is it possible? What is a state if exceeded? It's when the air pressure does n' t change that it seems to be related to the critical temperature. For example, water can reach 138 degrees Celsius and alcohol can reach 30 degrees Celsius. Can the temperature of the liquid exceed the boiling point at standard atmospheric pressure? Doesn't the boiling point of the liquid change? More than possible? What is a state if exceeded? It's when the air pressure does n' t change that it seems to be related to the critical temperature. For example, water can reach 138 degrees Celsius and alcohol can reach 30 degrees Celsius.
- 20. Why is the boiling point of water less than a standard atmospheric pressure? The boiling point of water is 100 degrees, but now it's 97 degrees.