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Heat is removed from a molten metal of mass 2 kg at a constant rate of 10 kW till it is completely solidified. The cooling curve is shown in the fig.
Assuming uniform temperature throughout the volume of the metal during solidifications, the latent heat of fusion of the metal (in kJ/kg) is _______
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- 50 kJ/kg
- 51 kJ/kg
- 52 kJ/kg
- 49 kJ/kg
Correct Option: A
Heat Removed Rate = 10 KJ/s = 10 kW
Time for Removal = (20 – 10) = 10 sec
Latent Heat of fusion = 10 × 10
| = 100 | × Sec = 100kJ | Sec |
but mass = 2 kg
| 80 = | = 50 kJ/kg | 2 |
