Table of Contents
Does water boil at different temperatures?
The boiling point of a liquid varies depending upon the surrounding environmental pressure. For example, water boils at 100 °C (212 °F) at sea level, but at 93.4 °C (200.1 °F) at 1,905 metres (6,250 ft) altitude. For a given pressure, different liquids will boil at different temperatures.
Does pot size affect boiling time?
The pots are the manipulated variable. My operational definition is that if they boil at the same time there is no affect, and if they boil at different there is an affect on boiling with different pot sizes. Small Pot: 7:43, Larger Pot: 6:39 So pot size does affect the time it takes to boil.
Why does it take more heat to boil a large pot of water than a small cup of water?
Simply because the rate of flow of heat slightly increased when you added more water: Heat is transferred very quickly to the kettle (which I assume is made out of metal), as metal is a good conductor of heat. Air is a bad conductor, so no heat enters the water through the air.
Does water get hotter before it boils?
Cold water boils faster than hot water. There is, however, a good reason to use cold water instead of hot for cooking: hot water will contain more dissolved minerals from your pipes, which can give your food an off-flavor, particularly if you reduce the water a lot.
How long does it take for 2 cups of water to boil?
On a stove it would take about 5 minutes to boil 2 cups of water, depending on the stove and the factors I mentioned before. Usually it’s 2 minutes per cup of water. It would take a lot longer to boil water on a grill. In a microwave, it would take about 1.5 to 2 minutes to boil 2 cups of water.
Why does it get less when the water boils?
It takes less energy to bring water to the boiling point when atmospheric pressure is lower. Water will boil at a lower temperature at a higher altitude because of less energy.
Why does it take longer to boil water when you cover it?
When you cover the pot, you are creating pressure inside the pot which will increase the boiling point of water (known as Gay-Lussac’s law ). So he wondered, might covering the pot actually take longer due to the increased boiling point of water? The answer is no, it’s still better to cover. But let’s confirm this and understand the reason why. . .
Why does water boil faster in a pressure cooker?
In many pressure cookers, water will boil at 120 C (248 F) which is quite a bit higher than the normal boiling point (100 C / 212 F). But this effect is minimal compared to another effect. When you cover a pot, you are trapping the heat inside which is energy that can be used to heat and boil the water faster.
How are a pot and a cup of water the same?
In your example the cup and pot are the same temperature and no transfer of energy can occur between them. They have the same thermal energy. There is a difference in internal energy though. The pot has more mass, and more molecules that need to gain kinetic energy to reach a given temperature.
Why does pot of water have more thermal energy than Cup of water?
This means if two objects are at the same temperature but one has more mass than the other, the object with more mass has more thermal energy. So while both the cup and pot of water have the same temperature, the pot has more thermal energy due to having more molecules that vibrate than the cup of water.