How much energy in $kJ$ is required to heat $5 \, kg$ of water from $20^oC$ to its boiling point? (Specific heat of water = $4.2 \, kJ \, kg^{-1} \, ^oC^{-1}$)

  • A
    $1680$
  • B
    $7100$
  • C
    $1720$
  • D
    $1740$

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