Ice in Water

Relevant wiki: Heat Transfer

The melting speed of ice is directly dependent on the thermal conductivity of its surroundings. We know that water has a higher thermal conductivity and therefore the ice in bowl B will melt faster.

Relevant wiki: Heat Transfer

Water is a better thermal conductor than air. It transfers heat to the ice faster so it causes the ice to melt faster. If the water and the air is the same temperature. It also depends on the material of the bowl.

Same principle when defrosting food. Put some frozen chicken out on the countertop and it will take all day to thaw. Put it in some lukewarm water and it'll be ready in less than an hour. I used this trick to make dinner tonight.

OP's idea seems to be comparing heat conduction. But, from a more pure physics point of view, the boundary condition is not enough. E.g. wind etc. need to be specified.

Since the water in the room is likely to be around 70 degrees, the water his going to be pretty warm. Ice cube B which is below freezing, like any other ice cube, will preform osmosis (the diffusion of water) and will melt a ton quicker than ice cube A.

I thought since water was denser than air no matter what the temperature was if they were equal it would melt in the water first.

from thermdynmic laws, heat flows from higher temperature to lower. Here, water is more thermally conducting and transfers heat to ice resulting in melting it faster.

Water is a more potent conductant than air. Therefore, the ice cube will absorb the heat from the room temperature water more quickly than it would from room air alone. For that reason, the cube sitting in water will melt first.

Water has the highest thermal conductivity of any liquid and has more than that of air. That means if ice cube is surrounded by water more heat transfer takes place and hence the melting rate will be higher. Thus ice in bowl B will melt faster.

The rate of melting of ice depends largely on the thermal conductivity of the surrounding matter. In bowl A, the ice cube is surrounded by air which his a poor conductor of heat. In bowl B though, the ice cube is surrounded by water. Though at room temperature, it is a way better conductor of heat when compared to air. So heat transfer is quicker and therefore the ice in bowl B melts comparatively faster.

The ice in bowl A only has one source of energy melting it which it the air, however bowl B is filled with water therefore more particles are transferring more kinetic energy to the ice than bowl A.

Water is more thermal conductive than air, therefore the ice loses temperature difference and eventually melts

I be but a simple Pirate, an' I figure that when a scurvy rascal walks the plank in cold water they go to Davy Jones locker faster in cold water! I be a reckoning the opposite be true in warm water. That is why yon cube of ice be a gonna in ye second bowl.

Simple answer, room temperature water will bring ice to its temperature faster than ice on its own.

See, if the room temperature is warm enough to melt ice, and Bowl B has the room temperatured water in it, the ice cube would melt faster.

The reason is that heat is always transferred from hot body to cold body,hence in bowl B there is water at room temperature which is warmer than the ice cube therefore,heat is transferred from the water at room temperature to the ice, melting it at a faster rate.

Specific Heat Capacity of water is more than that of air so ice will take up more heat from water at room temperature and melt fatser (due to high specific Latent Heat of Fusion of ICE).

It depend of your bowl thermal conductivity! of course if the bowl is in plastic or ceramic the answere is B for metal or cast iron bowl the answere is less direct!

Since more number of molecules come in contact for thermal conductivity in water the ice cube dipped in water will melt faster

Air Is a very good thermal Insulator, and liquid water regardless of temperature is a fairly efficient thermal conduction medium, hence water often being used to sink off or conduct heat. The bowl of air would preserve the state of the ice cube much better than the bowl of water would to say the least.

Model the system as a heat sink surrounded by a stationary medium (no convection or wind, no edge effects). The rate of heat transfer from the air (or water) to the ice cube is proportional to three factors: the density, the heat capacity, and the thermal conductivity.

Consider a small volume of air (or water) a short distance from the ice cube. How much heat can be transferred from the air (or water) to the ice cube? As the air (water) cools, it will transfer less heat.

• The heat capacity is a measure of how much heat can be transferred per degree of cooling. Water has 4.2 times the heat capacity of air (4200J/kgK vs 993 J/kgK).

• The mass of air/water in the small volume will be proportional to the density. Air is about 780 times less dense than water, so there will be 780 times less material in that volume to impart heat to the ice cube.

• The rate that heat will travel from the volume of air/water into the ice cube will depend on the thermal conductivity of the material between them: either ice or water. Water is 20 times more thermally conductive than air, so more heat will flow through water for a given temperature gradient.

So the part of the ice cube in contact with water will melt 4.2 x 780 x 20 = 65000 times faster than an ice cube only touching air.

Water has better thermal conductivity than air. So bowl B ice will melt first.

This happens because water has high specific heat capacity than aur.

Water is a better thermal conductor than air. It transfers heat to the ice faster so it causes the ice to melt faster. If the water and the air is the same temperature. It also depends on the material of the bow