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When a cup of tea cools down how is the heat transferred to the surroundings?
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∙ 8y ago
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Contrast what happens to thermal energy in evaporation and condensation?
In evaporation, the heat is transferred to the substance being evaporated from some heat source or the surroundings. It is released by the substance.
What does a substance gain or lose when its temperature changes?
The density of the substance becomes higher because of the particles slow down and move closer together when the substance cools.
What takes place as an ice cube cools a drink?
kinetic energy in the drink increasesA calorie of heat energy is transferred from the ice to the water of the drink. Because ice absorbs heat from the drink, cooling down its temp.Common mistake:People think that ice producess coldness, when all its doing to the drink is absorbing the heat, causing the ice cube to melt ;)You say that a calorie of heat energy is transferred from the ice to the water, but that is not entirely correct as a calorie is defined as the amount of heat that 1g of water releases when it cools by 1 degrees Celsius. What if i add a really small block of ice? Surely a calorie of heat will not be transferred from the ice to the water. Therefore it would be more correct to say that the total kinetic energy of the drink decreases.
When ice on a plate melts why does the plate cool down as well?
When ice is placed on a plate that is warmer than the ice, some of the heat energy from the plate is transferred to the ice. (This is due to the molecules in the plate transferring kinetic energy to those in the ice. The molecules in the plate crash into those in the ice, losing speed and giving the molecules in the ice more speed). Since the heat energy is transferred away from the plate, the plate cools down. (The ice is not cooling down, it is heating up.)
Why the sand on the beach cools down faster than the ocean water?
Sand does not retain heat as easily as water. Therefore, sand cools down faster than the ocean water.
How is heat transferred from the outside of the mug to the surroundings?
conduction
Is an endothermic reaction one in which heat is transferred from the surroundings to the reactants?
Correct.
What happens when sodium bicarbonate is heated?
The reaction between HCL and Sodium Bicarbonate is an endothermic reaction, meaning that the product itself cools down and produces heat to its surroundings. Therefore, it does produce heat, but to its surroundings.
An endothermic reaction is one in which heat is transferred from the surroundings to the reactants?
Yes, this affirmation is true.
Is an exothermic reaction one in which heat is transferred from the surroundings to the reactants?
No. That would be an endothermic reaction.
Water cools down in an earthen pot give reaseons?
Earthen pots have tiny holes in them through which some of the water keeps seeping. But it is not noticeable. The water which is now outside the earthen pot evaporates. Durin evaporation, the water gain heat energy from the surroundings to evaporate. Thus the surroundings and the water in the earthen pot loses heat energy and cools gradually.
WHAT In an exothermic reaction energy is transferred from?
In an exothermic reaction energy is transferred from the system to the surroundings. An exothermic reaction is a chemical or physical reaction that releases heat.
Is heat the sum of kinetic energy then what is temperature?
Temperature is the average kinetic energy of atoms as they move in and out of a system and its surroundings. Heat is the kenetic energy that is transferred.
What happens to thermal energy in evaporation and condensation?
In evaporation, the heat is transferred to the substance being evaporated from some heat source or the surroundings. It is released by the substance.
An endothermic reaction is one in which heat is transferred from the surroundings to the reactants.?
Yes, this affirmation is true.
Contrast what happens to thermal energy in evaporation and condensation?
In evaporation, the heat is transferred to the substance being evaporated from some heat source or the surroundings. It is released by the substance.
How does heat travel in terms of particles in different substances?
when it cools down
