Latent heat of fusion for Silver

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Homework Help Overview

The discussion revolves around calculating the minimum energy required to melt a specific mass of silver, initially at a given temperature. The subject area includes thermodynamics, specifically focusing on latent heat and specific heat capacity.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • The original poster attempts to apply a formula involving mass, specific heat, and latent heat of fusion but questions the correctness of the formula and the necessity of unit conversions. Participants discuss the importance of using consistent units and clarify that temperature differences can be expressed in Celsius without conversion to Kelvin.

Discussion Status

Participants have provided guidance on the correct approach to the problem, emphasizing the need to identify the latent heat of fusion for silver and the specific heat capacity. There is an acknowledgment of the need for unit consistency, but no explicit consensus on the final steps has been reached.

Contextual Notes

Participants note the importance of using the correct units for specific heat and latent heat, which may require conversions depending on the sources of these values. The original poster's uncertainty about the formula and unit conversions highlights potential gaps in understanding that are being explored in the discussion.

jr662
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1. Calculate the minimum amount of NRG, in joules required to completely melt 130g of silver initially at 15 degrees Celsius.
2. ? Q = mC (Tf-Ti) + mHf? saw it online somewhere, not sure what the proper formula for this problem is, and if it is done does everything need to be converted to kelvins and kg's??Why or why not?
 
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That is absolutely right you only have to find the temperature at which silver melts and its C (specific heat) and Hf (fussion heat). With respect to units you use it depends on what you prefere but usually your choice depends on the units C and Hf are given in (remember they have to be the same system of units).

Hope this helps any other issue just tell me.
 
Your formula is correct but you need to look up the latent heat of fusion for silver. Depending on the units in which it is given, you may have to do some conversions. Since a temperature difference is the same in Kelvin as in Celsius, you do not need to convert that.
 
thanks a bunch!
 

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