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>> $How much heat energy is gained when 5 kg$

Question

How much heat energy is gained when 5 kg of water at $2 0^{\circ} C$ is brought to its boiling point?

A

1680 KJ

B

1700 KJ

C

1720 KJ

D

1740 KJ

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Solution

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Correct option is A)

$Q = m c Δ θ$
$= 5 \times (1000 \times 4.2) \times (100 - 20)$
$= 1680 \times 1 0^{3} J$
$= 1680 K J$
Hence,
option $(A)$ is correct answer.

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