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Ch 17: Temperature and Heat
Young & Freedman Calc - University Physics 15th Edition
Young & Freedman Calc15th EditionUniversity PhysicsISBN: 9780135159552Non è quello che usi tu?Cambia libro di testo
Capitolo 17, Problema 52

A 4.004.00-kg silver ingot is taken from a furnace, where its temperature is 750.0750.0°C, and placed on a large block of ice at 0.00.0°C. Assuming that all the heat given up by the silver is used to melt the ice, how much ice is melted?

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First, identify the specific heat capacity of silver, which is approximately 0.235 J/g°C. This will be used to calculate the amount of heat lost by the silver as it cools down.
Convert the mass of the silver ingot from kilograms to grams, since the specific heat capacity is given in J/g°C. The mass of the silver ingot is 4.00 kg, which is equivalent to 4000 g.
Calculate the change in temperature for the silver as it cools from 750.0°C to 0.0°C. The change in temperature (ΔT) is 750.0°C - 0.0°C = 750.0°C.
Use the formula for heat transfer: Q=m⁢c⁢ΔT, where Q is the heat lost, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature. Substitute the values to find Q.
Finally, use the heat of fusion for ice, which is approximately 334 J/g, to calculate the mass of ice melted. Use the formula: m=QL, where m is the mass of ice melted, Q is the heat transferred, and L is the heat of fusion. Substitute the calculated Q and L to find the mass of ice melted.

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Specific Heat Capacity

Specific heat capacity is the amount of heat required to change the temperature of a unit mass of a substance by one degree Celsius. It is crucial for calculating the heat lost by the silver ingot as it cools from 750.0°C to 0.0°C, which will then be used to melt the ice.
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Specific Heat & Temperature Changes

Heat Transfer

Heat transfer is the process of energy moving from a hotter object to a cooler one. In this scenario, the heat from the silver ingot is transferred to the ice, causing the ice to melt. Understanding this concept helps in calculating the amount of ice melted based on the heat lost by the silver.
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Overview of Heat Transfer

Latent Heat of Fusion

Latent heat of fusion is the amount of heat required to change a unit mass of a solid into a liquid without a temperature change. This concept is essential for determining how much ice is melted, as it relates the heat absorbed by the ice to the mass of ice that undergoes phase change.
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Latent Heat & Phase Changes
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