Latent heat of fusion of ice

In summary, a 58.0 kg ice-skater gliding to a stop at 6.25 m/s on ice at 0°C will result in a percentage of the skater's kinetic energy being converted to heat energy, which is represented by Delta U. To find the amount of heat given to the ice, first calculate the skater's initial kinetic energy and then find 53.5% of that value and apply it to the heat of melting of ice.
  • #1
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A 58.0 kg ice-skater moving at 6.25 m/s glides to a stop. Assuming the ice is at 0°C and that 53.5 percent of the heat generated by friction is absorbed by the ice, how much ice melts?

Should I first calculate the work? I know I need to use Delta U= Q-W...but what is Delta U in this case?
 
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  • #2
53.5% of the kinetic energy is converted to heat energy which is delta U.
 
  • #3
How do I find Q given to the ice?
 
  • #4
First, calculate the kinetic energy of the skater initially. Since the skater completely loses that energy, it must have gone into heat caused by the friction with the ice.

Find 53.3% of that and apply that to the "heat of melting" of ice.
 

What is the latent heat of fusion of ice?

The latent heat of fusion of ice is the amount of energy required to convert a unit mass of solid ice into liquid water at the same temperature and pressure. This process occurs at 0°C and is an endothermic process, meaning it absorbs heat from the surrounding environment.

Why is the latent heat of fusion of ice important?

The latent heat of fusion of ice is important because it plays a crucial role in many natural processes, such as the melting of glaciers and the formation of sea ice. It also has practical applications in industries such as food preservation and refrigeration.

How does the latent heat of fusion of ice affect the Earth's climate?

The latent heat of fusion of ice plays a significant role in regulating the Earth's climate. As ice melts, it absorbs energy from the surrounding environment, which helps to keep the Earth's temperature stable. However, as more ice melts due to global warming, this process is disrupted, leading to a rise in temperature and other climate changes.

How is the latent heat of fusion of ice measured?

The latent heat of fusion of ice is typically measured using a calorimeter, which is a device that can accurately measure the amount of heat absorbed or released during a physical or chemical process. The ice is placed in the calorimeter, and the amount of heat required to melt it is recorded, allowing for the calculation of the latent heat of fusion.

Does the latent heat of fusion of ice vary?

Yes, the latent heat of fusion of ice can vary slightly depending on factors such as pressure and impurities in the ice. However, at standard atmospheric pressure, the latent heat of fusion of ice is considered to be constant at 334 joules per gram.

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