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Thursday, 02 April 2026
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A heater marked 50W will evaporate 0.005kg of boiling water in 50 seconds. The specific ...

A heater marked 50W will evaporate 0.005kg of boiling water in 50 seconds. The specific latent heat of vaporization of water in J/kg is
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  • A 5.0 x 106
  • B 1.0 x 106
  • C 2.5 x 106
  • D 2.5 x 105
  • E 5.0 x 105
Correct Answer: Option E
Explanation:
Heat energy = Electrical energy
mL = power x time
0.005 x L = 50 x 50
L = 5 x 105J/kg

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