find the amount of sodium for which 50 joules of energy required to melt it at its melting point. (LHF of sodium is 2.38 cal/gm)
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Explanation:
1 cal = 4.184 joules
2.38 cal/gm = 2.38*4.184 joules/gm = 9.95792 joules/gm
Thus, amount of sodium that would be melted by 50 joules = 50 joules/9.95792 joules/gm = 5.0211 gms
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