This is due to the reason that he heat given by the flame is quickly transferred from the paper cup to the water. As a result the temperature if the paper does not reach the ignition temperature and hence is not burned. The heat gained by water raises its temperature and finally it starts boiling.
Now light this cloth with a match sticks. It is observed that the cloth catches fire immediately. After sometime, the fire extinguishes without burning the cloth. The above observation can be easily explained as follows: When the cloth soaked in alcohol and water is lighted. The alcohol catches fire immediately and starts burning. The heat produce due to combustion of alcohol is absorbed by water which gets converted into steam.
The presence of water in the cloth does not allow the temperature of the cloth to rise above the boiling point of water. Subject Science Physical Science. Thank you for your input. Materials Several plain paper cups—most are coated with wax, but try to find the uncoated kind Several Styrofoam cups Water Stove burner Dry sand Tongs Large cabbage optional.
Disclaimer and Safety Precautions Education. In addition, your access to Education. Warning is hereby given that not all Project Ideas are appropriate for all individuals or in all circumstances. Implementation of any Science Project Idea should be undertaken only in appropriate settings and with appropriate parental or other supervision. Reading and following the safety precautions of all materials used in a project is the sole responsibility of each individual. For further information, consult your state's handbook of Science Safety.
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This property helps the lamp fixture stay cool inside the paper cup globe Note whether the warm water mixes or forms a layer with cold water. Science fair project that compares the freezing temperature of salt water and freshwater in order to learn about supercooling and condensation nuclei. Buoyant Force of Water.
The buoyant force of water explains why some objects float in water. But first, we have to verify your age!
Water boils at C and paper burns somewhere in the ballpark of C. You could certainly heat the paper to C and the water would boil without burning the paper. If you put a direct flame to the cup, you should also be ok, so long as the paper is thin and the part of the paper cup touching flame is also touching water.
This is because objects in contact tend to equalize their temperature. Water boils at C, and it stays at C as you add extra heat to it--you only change the rate at which is boils. This means the paper touching it wants to stay at C as well and it transfers any extra heat to the boiling water in order to do so. So if you apply a direct flame to the bottom of a paper cup filled with water, the paper shouldn't burn. Of course if the paper is thick so that it can't transfer the heat from the outside to the water quickly enough or if the water boils off, then the paper can burn.
Geezer Naked Science Forum King! Of course, you could always heat up a rock quartz is quite good in a fire, then drop it into the paper cup containing the water. But stand well back, and wear safety glasses.
Nov 09, · Boiling water in a paper cup isn't as hard as it looks! If you held the cup at an appropriate distance from the flame, the water in the paper should have eventually boiled. The circular rim on the bottom may have burned. If your paper cup had a waxy coating, the wax may have melted off. The paper cup with sand will burn slightly/5(64).
Turns out, as long as the cup does not contain wax (which would draw some of the heat, thereby preventing the water from reaching a temperature hot enough to boil), a paper cup could in fact stand the heat of an open flame without catching fire while transferring the .
Just fill a paper cup with water and start trying to burn it from the outside. The water will boil vigorously inside the cup, but the paper itself will not combust. It's tempting to say that the water keeps the paper from reacting with oxygen, which is needed for the oxidization process of fire. (a) Take some water in a paper cup and heat it. It is observe that it is possible to boil water without burning the paper cup. This is due to the reason that he heat given by the flame is quickly transferred from the paper cup to the water. As a result the temperature if the paper does not reach the ignition temperature and hence is not burned.
Jun 06, · You could certainly heat the paper to C and the water would boil without burning the paper. If you put a direct flame to the cup, you should also be ok, so long as the paper is thin and the part of the paper cup touching flame is also touching water.