Tea kettle question.

[Gawdzilla Sama]

If you put 500 ml of hot water in a tea kettle will it heat to boiling faster than 750 ml of hot water?

[FBM]

Of course, assuming they start at the same temp, have the same rate of heat applied, at the same altitude, yada yada. Just take it to the extremes and see how it works. Take a teaspoon of water and apply that heat, then take a liter of water and apply the same heat. The teaspoonful will be vapor before the liter gets warm.

[Atheist-Lite]

If you put 500 ml of hot water in a tea kettle will it heat to boiling faster than 750 ml of hot water?

What is the temperature surrounding the kettle?

[Gawdzilla Sama]

Of course, assuming they start at the same temp, have the same rate of heat applied, at the same altitude, yada yada. Just take it to the extremes and see how it works. Take a teaspoon of water and apply that heat, then take a liter of water and apply the same heat. The teaspoonful will be vapor before the liter gets warm.

The extremes aren't of interest. My thought is there is more "energy" in the 750 than in the 500, so it would take less external heat to bring the 750 to a boil.

[Gawdzilla Sama]

If you put 500 ml of hot water in a tea kettle will it heat to boiling faster than 750 ml of hot water?

What is the temperature surrounding the kettle?

Well, it's setting on a burner, so I would say warmish at least.

[FBM]

Of course, assuming they start at the same temp, have the same rate of heat applied, at the same altitude, yada yada. Just take it to the extremes and see how it works. Take a teaspoon of water and apply that heat, then take a liter of water and apply the same heat. The teaspoonful will be vapor before the liter gets warm.

The extremes aren't of interest. My thought is there is more "energy" in the 750 than in the 500, so it would take less external heat to bring the 750 to a boil.

The extremes demonstrate the principle. Yes, there is more energy in 750 ml than in 500, but it's distributed throughout a larger volume, too, so water doesn't boil at a certain volume, but at a certain temperature.

[Atheist-Lite]

The pressure is a important component. The amount of heat require to boil water under pressure is less than that when not under pressure. And the pressure will act on just one surface of the cylinder of water. So although volume is not relavant the shape of the kettle may be?

[Gawdzilla Sama]

Of course, assuming they start at the same temp, have the same rate of heat applied, at the same altitude, yada yada. Just take it to the extremes and see how it works. Take a teaspoon of water and apply that heat, then take a liter of water and apply the same heat. The teaspoonful will be vapor before the liter gets warm.

The extremes aren't of interest. My thought is there is more "energy" in the 750 than in the 500, so it would take less external heat to bring the 750 to a boil.

The extremes demonstrate the principle. Yes, there is more energy in 750 ml than in 500, but it's distributed throughout a larger volume, too, so water doesn't boil at a certain volume, but at a certain temperature.

True, but you have to add energy to the mass to increase the temperature. My question is, is there a significant difference in the amount of energy need to boil a mass when the total energy of the mass is higher in one case over another?

[Gallstones2]

Of course, assuming they start at the same temp, have the same rate of heat applied, at the same altitude, yada yada. Just take it to the extremes and see how it works. Take a teaspoon of water and apply that heat, then take a liter of water and apply the same heat. The teaspoonful will be vapor before the liter gets warm.

The extremes aren't of interest. My thought is there is more "energy" in the 750 than in the 500, so it would take less external heat to bring the 750 to a boil.

More energy released by the 750 ml of water but it will take more energy to heat it

[Hermit]

Of course, assuming they start at the same temp, have the same rate of heat applied, at the same altitude, yada yada. Just take it to the extremes and see how it works. Take a teaspoon of water and apply that heat, then take a liter of water and apply the same heat. The teaspoonful will be vapor before the liter gets warm.

The extremes aren't of interest. My thought is there is more "energy" in the 750 than in the 500, so it would take less external heat to bring the 750 to a boil.

If you think of the energy present in the water in terms of energy per millilitre, and keep in mind that you need 50% more energy to the boil in a tea kettle containing 750ml of water compared to a kettle containing 500ml, things should become a bit clearer to you.

[Gawdzilla Sama]

Of course, assuming they start at the same temp, have the same rate of heat applied, at the same altitude, yada yada. Just take it to the extremes and see how it works. Take a teaspoon of water and apply that heat, then take a liter of water and apply the same heat. The teaspoonful will be vapor before the liter gets warm.

The extremes aren't of interest. My thought is there is more "energy" in the 750 than in the 500, so it would take less external heat to bring the 750 to a boil.

More energy released by the 750 ml of water but it will take more energy to heat it

That's what I'm wondering.

[Gawdzilla Sama]

Of course, assuming they start at the same temp, have the same rate of heat applied, at the same altitude, yada yada. Just take it to the extremes and see how it works. Take a teaspoon of water and apply that heat, then take a liter of water and apply the same heat. The teaspoonful will be vapor before the liter gets warm.

The extremes aren't of interest. My thought is there is more "energy" in the 750 than in the 500, so it would take less external heat to bring the 750 to a boil.

If you think of the energy present in the water in terms of energy per millilitre, and keep in mind that you need 50% more energy to the boil in a tea kettle containing 750ml of water compared to a kettle containing 500ml, things should become a bit clearer to you.

If I understood that, yes.

[FBM]

Of course, assuming they start at the same temp, have the same rate of heat applied, at the same altitude, yada yada. Just take it to the extremes and see how it works. Take a teaspoon of water and apply that heat, then take a liter of water and apply the same heat. The teaspoonful will be vapor before the liter gets warm.

The extremes aren't of interest. My thought is there is more "energy" in the 750 than in the 500, so it would take less external heat to bring the 750 to a boil.

The extremes demonstrate the principle. Yes, there is more energy in 750 ml than in 500, but it's distributed throughout a larger volume, too, so water doesn't boil at a certain volume, but at a certain temperature.

True, but you have to add energy to the mass to increase the temperature. My question is, is there a significant difference in the amount of energy need to boil a mass when the total energy of the mass is higher in one case over another?

Can you boil an ocean with a cigarette lighter?

[Gawdzilla Sama]

Can you boil an ocean with a cigarette lighter?

Again, you're talking extremes. I'm talking about a closed system with relatively similar amounts of mass to be heated.

To restate: Will 500 ml of hot water boil faster than 750 mi of hot water if all else is equal. If you add equal amounts of energy to both you get a higher total quantity of energy in the 750, yes?

[HomerJay]

What if you don't make tea afterwards, is it still a tea kettle?