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10-1.Thermometry, Thermal Expansion and Calorimetry
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How much heat energy is gained when $5\, kg$ of water at $20°C$ is brought to its boiling point ......$kJ$ (Specific heat of water $ = 4.2\, kJ\, kg^{-1}c^{-1}$)
A
$1680$
B
$1700$
C
$1720$
D
$1740$
Solution
(a) $Q = m.c.\Delta \theta = 5 \times (1000 \times 4.2) \times (100 – 20)$
$ = 1680 \times {10^3}J = 1680\,kJ$
Standard 11
Physics
