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WAEC Physics 2010 Paper
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© africaexams.com
Question : 22
Total: 50
A solid of mass 0.5kg initially at 50
o
C melts at 60
o
C. Calculate the quantity of heat required to melt it completely. [specific heat capacity of the solid =2.0KJ kg
-1
K
-1
][Specific latent heat of fusion of solid =1.0 KJ kg
-1
]
1500J
10000J
10500J
15000J
Validate
Solution:
Q = ML + C
θ
= 0.5 x 1000 + 0.5 x 2000 x 10
= 10500
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