A silver chain has a mass of 0.2 kg and it is initially atthe temperature of 25o

Question

A silver chain has a mass of 0.2 kg and it is initially atthe temperature of 25oC
a) What is the final temperature of the chain if we add to ita quantity of heat Q= 350J
b) How much in order to melt the chain completely? c) How much heat should be added to the chain in order to melthalf of it?
Use the following data for silver Heat of fusion L=88.3 x 103J/kg Melting point= 96oC Specific Heat= 0.23 x 103 J/(kgoK)
a) What is the final temperature of the chain if we add to ita quantity of heat Q= 350J
b) How much in order to melt the chain completely? c) How much heat should be added to the chain in order to melthalf of it?
Use the following data for silver Heat of fusion L=88.3 x 103J/kg Melting point= 96oC Specific Heat= 0.23 x 103 J/(kgoK)

Explanation / Answer

(a)          Q = m S T     or Q = m S (T2 - T1 ) ( T2 - T1 ) = Q / m S                     = 350 / ( 0.2 * 0.23 x103  )                     = 7.608         T2    = 7.608 + 25                     = 32.608                     ˜ 32.6oC (b)          Q   = m L                = 0.2 * 88.3 x 103                = 17.66   x 103   J similarly do the other one. Hope this helps u!

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