Question

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)

Answer 1

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