A 2.5 kg cast iron pot contains 1.8 L of water at 20oC. How many minu

1.	A 2.5 kg cast iron pot contains 1.8 L of water at 20oC. How many minutes will it take to boil half away on a 5 kW burner with 40% heat loss. Specific heat of cast iron is 0.46 kJ/kg-K.
Answer» using formula p x t = ms\(\Delta\)t 5 x 10³ x t = 2.5 x 0.46 x [373 - 293] 5 x 10³ x t = 92 t = \(\frac{92}{5\,\times\,10^3}\) t = 18.4 x 10^-3 sec t = 0.3066 x 10^-3 m

A 2.5 kg cast iron pot contains 1.8 L of water at 20oC. How many minutes will it take to boil half away on a 5 kW burner with 40% heat loss. Specific heat of cast iron is 0.46 kJ/kg-K.

Answer»

using formula p x t = ms\(\Delta\)t

5 x 10³ x t = 2.5 x 0.46 x [373 - 293]

5 x 10³ x t = 92

t = \(\frac{92}{5\,\times\,10^3}\)

t = 18.4 x 10^-3 sec

t = 0.3066 x 10^-3 m

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A 2.5 kg cast iron pot contains 1.8 L of water at 20oC. How many minutes will it take to boil half away on a 5 kW burner with 40% heat loss. Specific heat of cast iron is 0.46 kJ/kg-K.

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