What is the best way to raise the temperature of 250 mm. of water in a shoe box?

To raise the temperature at least 20 degrees celcius

What is the best way to raise the temperature of 250 mm. of water in a shoe box?
heat it
Reply:BEST WAY ? Does that mean quickest? Safest? Please define BEST? Probably the quickest way would be to add some chemicals that would release heat, that is cause an EXOTHERMIC REACTION. Adding some concentrated acids or some metals like sodium metal would release heat rapidly. Obviously this would NOT BE THE SAFEST WAY WITHOUT PROPER PRECAUTIONS!
Reply:Surround the shoebox with black paper. black attracts more sunlight and heat. I did an experiment where i heated up a brick using black cardboard paper and the brick was hot to the touch.
Reply:hi
Reply:Cover the whole thing with plastic wrap, then set it in the sun. If you don't have sun, set it directly under a lamp, but don't melt the plastic. The plastic will help the water get hotter, quicker. If you set the box on a piece of metal, and put that in the sun too, it should get hotter, even more quickly.
Reply:why all the water in a shoe box sounds very strange to me...
Reply:You can heat it with a heating coil inside the water and not touching the sides or bottom of the box.





Alternatively, if the cardbox bottom is not too thick, you can raise the box on a stand and experiment by heating the bottom with a moderate open flame like a couple of candles. The heat can be transferred without burning off the paper if applied correctly. Japanese restaurants do serve piping hot soup/noodles using paper bowls heated below by open fuel-fire.
Reply:burn the shoe box.very strange ques.



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