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Why water at the top boils but the ice wrapped in iron gauze does not melt when heating a test tube at the top?
This has to do with the rate of heating. Your heater (of whatever type) transfers a lot of energy into the top of the tube, heating the water there. However, below the heater, the water is only heated by the water above it. Since water takes a relatively large amount of energy to heat, this lesser energy transfer is not enough to melt the ice at the bottom of the tube before boiling the water at the top of the test tube. The hot water will convect somewhat, aiding the process, but hot water is less dense than cold water (until the 0-4 celsius range, at which point cooling water will decrease density as ice particles begin to form) and will therefore rise. As the top is already being heated, convection will not have a significant effect. If you heat the bottom with the ice at the top, the rising warm water will greatly increase the energy transfer and will melt the ice much more quickly.
Another answer is that the gauze is stopping the heat from getting to the ice. The gauze is acting as an insulator, keeping the heat out. The ice will melt eventually however.
What else can I help you with?
Heating water so that it boils is an example of .?
Vaporization is a change of phase.
When the ice cube wrapped with copper wire gauze kept in a test tube half filled with water and heated the ice is not melted though water is boiled?
The ice cube wrapped in copper wire gauze does not melt because the copper wire acts as a thermal insulator, preventing the heat from the boiling water in the test tube from effectively reaching the ice. Instead of transferring heat directly to the ice, the wire conducts heat away, allowing the water to boil while keeping the ice intact. Additionally, the surrounding water may be at a temperature that is not sufficient to melt the ice due to this insulating effect.
What happens to liquid water when it boils?
When liquid water boils, it changes state from a liquid to a gas. This process involves the water molecules gaining enough energy to overcome the intermolecular forces holding them together, resulting in the formation of water vapor.
Can distillation be us to separate water and kerosene?
Yes, distillation can be used to separate water and kerosene. This is because they have different boiling points; water boils at 100 degrees Celsius, while kerosene boils at a higher temperature. By heating the mixture and collecting the vapor at different temperatures, you can separate the two components.
What is the K temperature at which water boils?
Water boils at 373.15 Kelvin.
Heating water so that it boils is an example of .?
Vaporization is a change of phase.
How can heating water so that it boils is an example of?
Vaporization is a change of phase.
Can water affect car heating?
Water boils hotter and faster then antifreeze, more water means engine damage.
Why is your hot water heater wrapped in a thick cover?
To keep the water hot longer. Saves on heating costs.
What boils when placed on a natural gas burner?
Water boils when placed on a natural gas burner. The heat from the burner transfers to the pot, heating the water until it reaches its boiling point and turns into steam.
What happens to liquid when it boils?
imagine that you are heating a pan of tap water on a cooker and taking the temperature of the water with a thermometer every two minutes until after the water has boiled
Does the amount of water affect when the water boils?
yes. the more water the longer it would take for the heating element to heat the water. the less water, the less time it would take to heat.
What energy transformations occur in a stove heating a pot of water up to boiling?
In a stove heating a pot of water, electrical energy is converted to thermal energy as the stove’s heating element produces heat. The thermal energy transfers to the pot and water, raising their temperatures. As the water boils, some of the thermal energy is converted to kinetic energy in the form of water vapor.
When a kettle boils what are the energy transfers?
When a kettle boils, energy is transferred from the electric heating element to the water in the form of heat. The heat energy causes the water to increase in temperature until it reaches its boiling point, at which point some of the heat energy is also used to convert the water into steam.
Where does water go to when it boils?
When water boils, it turns into water vapor or steam. This water vapor rises into the air and eventually dissipates.
What water boils faster salt water vinegar water or fresh water?
saltwater boils the fastest
What is the K temperature at which water boils?
Water boils at 373.15 Kelvin.
