How long will it take to heat 3kg of water from 28oC to 88oC in...

WAEC 2006

How long will it take to heat 3kg of water from 28^oC to 88^oC in an electric kettle taking 6a from a 220V supply? [specific heat capacity of water = 4180 J kg^-1K^-1]

A. 120s
B. 570s
C. 600s
D. 836s

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Correct Answer: Option B

Explanation

t = \(\frac{mc\theta}{IV} = \frac{3 \times 4189 \times 60}{6 \times 120} = 570s\)

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How long will it take to heat 3kg of water from 28oC to 88oC in...

Correct Answer: Option B

Explanation

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