Class 11Physics1 Thermal Properties of Matter: Thermometry, Expansion and CalorimetryPrinciple of Calorimetry and Water Equivalent
DifficultWater of volume $2\, L$ in a closed container is heated with a coil of $1\, kW$. While water is heated,the container loses energy at a rate of $160\, J/s$. In how much time will the temperature of water rise from $27\, ^\circ C$ to $77\, ^\circ C$? (Specific heat of water is $4.2\, kJ/kg\cdot K$ and that of the container is negligible)
- A$8\, min\, 20\, s$
- B$6\, min\, 2\, s$
- C$7\, min$
- D$14\, min$
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