- Does stirring affect temperature?
- How many minutes do you boil water to purify it?
- How is energy transferred when you boil water?
- How long should I boil broccoli?
- Why does stirring dissolve a solute?
- Why does a cup of hot tea cool down over time?
- Can you boil water by shaking it?
- Does boiling tap water purify it?
- What bacteria can survive boiling water?
- Is rain water safe to drink?
- How does temperature affect the rate of dissolution?
Does stirring affect temperature?
Stirring will help cool a hot drink because it speeds up the process of convection by bringing the hottest liquid at the bottom to the top, where it can be cooled by the air.
This is because the spoon heats up in the liquid and cools when removed, taking heat from the system more quickly..
How many minutes do you boil water to purify it?
If the water is clear: Bring the clear water to a rolling boil for 1 minute (at elevations above 6,500 feet, boil for three minutes). Let the boiled water cool.
How is energy transferred when you boil water?
The thermal energy transfers to the water. When the water boils, a little of the energy is transformed into sound. If a book or other object is on a shelf, it has gravitational potential energy. If it falls off the shelf, the gravitational potential energy is transformed into kinetic energy.
How long should I boil broccoli?
To boil, place in a pan of boiling water and cook the florets for 6-8 minutes. To steam, place in a steamer over boiling water and cook for 6-8 minutes. Broccoli to be stir-fried should be separated into bite-sized florets, heat 1 tbsp of oil in a frying pan and add the florets, cook for 4-5 minutes or until tender.
Why does stirring dissolve a solute?
The stirring allows fresh solvent molecules to continually be in contact with the solute. If it is not stirred, then the water right at the surface of the solute becomes saturated with dissolved sugar molecules, meaning that it is more difficult for additional solute to dissolve.
Why does a cup of hot tea cool down over time?
Their answer, in short: Yes, a hot drink can cool you down, but only in specific circumstances. “If you drink a hot drink, it does result in a lower amount of heat stored inside your body, provided the additional sweat that’s produced when you drink the hot drink can evaporate,” Jay says.
Can you boil water by shaking it?
The heat has to raise the water from room temperature to boiling point, so the only thing that can alter the time taken to boil is the amount of water in the kettle. Shaking it or doing anything else can’t alter the amount of heat being transferred from the element to the water.
Does boiling tap water purify it?
Boiling water makes it safe to drink in the event of some type of biological contamination. You can kill off bacteria and other organisms in a batch of water simply by bringing it a boil. Other types of pollutants, such as lead, are not so easily filtered out, however.
What bacteria can survive boiling water?
Boiling does not ensure the elimination of all micro-organisms; the bacterial spores Clostridium can survive at 100 °C (212 °F) but are not water-borne or intestine affecting. Thus for human health, complete sterilization of water is not required.
Is rain water safe to drink?
Germs and Other Contaminants While useful for many things, rainwater is not as pure as you might think, so you can’t assume it’s safe to drink. Rain can wash different types of contaminants into the water you collect (for example, bird poop on your roof could end up in your water barrel or tank).
How does temperature affect the rate of dissolution?
For many solids dissolved in liquid water, the solubility increases with temperature. The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.