WAEC - Physics (1988 - No. 19)
0.5kg of water at 10oC is completely converted to ice by extracting 188000J of heat from it. If the specific heat capacity of water is 4200J kg-1C-1, calculate the specific latent heat of fusion of ice.
9.0 KJ kg-1
84.0 KJ kg-1
168.0 KJ kg-1
334.0 KJ kg-1
336.0 KJ kg-1
คำอธิบาย
Q = mcΔθ = (0.5 x 4200 x 10) + 0.5L
L = 334000
L = 334000