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10-1.Thermometry, Thermal Expansion and Calorimetry
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A student takes $50\,gm$ wax $($specific heat $= 0.6\, kcal/kg°C)$ and heats it till it boils. The graph between temperature and time is as follows. Heat supplied to the wax per minute and boiling point are respectively
A
$500 \,cal, 50°C$
B
$1000 \,cal, 100°C$
C
$1500 \,cal, 200°C$
D
$200°C$
Solution
(c) Since specific heat $= 0.6 kcal/gm \times °C ={ 0.6 cal/gm \times} ^\circ C$
From graph it is clear that in a minute, the temperature is raised from $0°C$ to $50°C.$
$\Rightarrow$ Heat required for a minute $= 50 \times 0.6 \times 50 = 1500 cal.$
Also from graph, Boiling point of wax is $200°C.$
Standard 11
Physics
