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Elenna [48]
3 years ago
12

A person packs two identical coolers for a picnic, placing twenty-four 12-ounce soft drinks and 5 pounds of ice in each. However

, the drinks put into cooler A were refrigerated for several hours before they were packed in the cooler, while the drinks put into cooler B were at room temperature. When the picnickers open the two coolers three hours later, most of the ice in cooler A is still present, while nearly all of the ice in cooler B has melted. Explain the differencea.This difference can be explained by the different composition of the drinks.b.When both drinks are placed into the ice, they release heat which then melts the ice in both coolers. But in cooler A the drinks are pre-chilled so they can absorb heat back and cool water back to ice.c.When warm drinks are placed into the ice, they release heat which then molts the lo The pre-chilled drinks are already cold so they do not release much heat and do not melt the ice.d.The ice would melt in both coolers anyway because three hours is enough time to melt 5 pounds of ice. So in cooler B both drinks and water will be at room temperature.e.But in cooler A the temperature of pre-cooled drinks is lower than the room temperature, they will absorb heat from water and freeze it.
Chemistry
1 answer:
Tresset [83]3 years ago
8 0

Answer:

C

Explanation:

Quantity of heat released or absorbed is directly proportional to change temperature ΔT in the formula for calculating quantity of heat absorbed or release mcΔT where m is the mass of the substance, c is specific heat capacity in J/(kgk) and ΔT is change in temperature in kelvin or Celsius. The pre-chilled drinks loses less heat energy since the temperature difference is low and it is kept in a cooler to reduce energy loss or absorbed compare to the other drinks kept at room temperature in the cooler which is averagely 23oC, the ice will absorb more heat energy from the drinks due to the larger difference in temperature of about 23oC and consequently melt

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Three questions come along with the given statement. It is in Spanish language:



a) Por qué se humedeció la parte exterior del frasco?


b) Por qué el hielo disminuyó su volumen y ahora es agua?


c) Por qué puede haber agua en el exterior?



These are the three answers (in English).



First question:



a) Por qué se humedeció la parte exterior del frasco?



The question is Why did the outside of the bottle get wet?



Answer:



The outside of the bottle get wet because the ice cubes cooled the walls of the bottle, so the air surrounding the bottle also cooled.



The air contains humidity (water) in gas phase. The hotter the air the more the amount of humidity it can retain, the cooler the air the less the amount of humidity it can retain.


Then, when the air close to the walls of the bootle got cooler some of the water in the air became liquid and those are the drops of water that you see in the outside of the bottle.



Second question



b) Por qué el hielo disminuyó su volumen y ahora es agua?



The question is Why did the ice diminish its volume and now it is water?



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The ice diminished its volume and now it is water, becasue the ice, which is cooler than the surroundings, received heat energy (from the surroundings) and then its temperature increased. At some moment, this temperature reached the melting point of the ice (water) and it started to become liquid.



Third question



c) Por qué puede haber agua en el exterior?



The question is: Why can there be water outside?




Answer:



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