When a cool water bottle and a cool cup of water kept at the same temperature in the refrigerator is kept outside. Why does the cup of water loses its coolness more faster than that of the Bottle water's coolness??????????
Its very urgent pls help
2006-09-07 00:38:55 · 14 answers · asked by Unique 1 in Science & Mathematics ➔ Chemistry
The cup is open at the top, and so heat is able to get to it. The bottle is more enclosed making it more insulated against the heat.
2006-09-07 00:41:36 · answer #1 · answered by just browsin 6 · 0⤊ 0⤋
Because of the size of the opening. The cup is open and so the coolness escapes and the heat comes in faster. A bottle will warm up slower because of the smaller opening. If the lid is on the bottle, then it will take even longer since the warmth struggles more to protrude the bottle.
2006-09-07 00:44:34 · answer #2 · answered by gnomus12 6 · 0⤊ 0⤋
it loses its coolness faster because it is a/ open therefore has little insulation and b/ it has a wide surface area exposed to the heat of the environment compared to the bottle. (the top surface of the water) Finally c/ the bottle has a wider surface on which condensation forms, causing slight evaporation and keeping it cooler than the cup for longer.
2006-09-07 00:45:08 · answer #3 · answered by Christopher 2 · 0⤊ 0⤋
the water in the cup has more surface area for the heat to act upon. when the molecules of water in the top layer get melted the heat starts acting on the molecules in the layer below that & so on. but in a bottle the surface area is much reduced in comparison to the cup
2006-09-07 02:51:03 · answer #4 · answered by poison ivy 2 · 0⤊ 0⤋
It's because of the opening surface of the cup is more than that of the bottle.
Heat flows from atmosphere to both of them. For the cup the heat transfer is more than that of the bottle. That's why.
2006-09-07 01:18:41 · answer #5 · answered by M1976 2 · 0⤊ 0⤋
cup has a wider openig compared o bottle thus it get contact with air(which is of higher temperature than fridge cooled water)
thus the coolness of water is lost faster
2006-09-07 02:29:03 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Because when both are taken out despite of having the same temp. cup looses the temp. rapidly due to more surface area of the water in cup , the heat transfer to the atmosphere is more due to this.
2006-09-07 00:53:03 · answer #7 · answered by poonaforyou_2006 3 · 0⤊ 0⤋
The cup of water has more surface area of water exposed to the warm air.
2006-09-07 00:45:02 · answer #8 · answered by Anonymous · 0⤊ 0⤋
Just to add on what every one has mentioned, another reason is quantity of water it will take more time to get a bottle full of water aas compared to cup full of water....
2006-09-08 02:20:51 · answer #9 · answered by Ashish Samadhia 3 · 0⤊ 0⤋
because the cup of cool water loses its temprature by direct air connection but it is not possible in bottle
2006-09-08 00:19:40 · answer #10 · answered by Harry Potter 1 · 0⤊ 0⤋