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How long will it take to heat 3kg of water from 28o

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

View answer & explanation

Correct answer is B

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

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