A 1600 Watt heater is used to melt a 5 kg block of ice that is initially at -15 degrees C..

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written 4.1 years ago by

kunalpathare1119 • 260

modified 4.1 years ago by

Munna9493 • 100

A 1600 Watt heater is used to melt a 5 kg block of ice that is initially at − 15 ∘ C . Determine the amount of time needed for the heater to convert the ice to liquid water assuming that 80 % of the energy from the heat is transferred to the ice.

thermodynamics

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written 4.1 years ago by

Munna9493 • 100

Given, p = 1600 KW

Mass = 5kg

Initial temp T1 = -15°C

Final temp T2 = 0° C

Efficiency is 0.80

h1 is the specific enthalpy of ice at temperature (-364.18 kJ/kg)

h2 is the specific enthalpy of saturated water at temperature 2 (0 kJ/kg)

Q is the heat …

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