Neco Model Questions Vol1 2024 Physics Question 8
Practice essay / theory question 8 from the 2024 Neco Model Questions Vol1 Physics examination. This question covers Heat, Specific heat capacity, Calorimetry, Newton's law of cooling, Thermal equilibrium .
A 0.500 kg copper block (specific heat capacity c_Cu = 385 J kg⁻¹ K⁻¹) at 200 °C is quickly dropped into a calorimeter containing 1.20 kg of water (c_water = 4186 J kg⁻¹ K⁻¹) initially at 25 °C. The calorimeter itself has a heat capacity of 150 J K⁻¹ and is assumed to be perfectly insulated during the mixing process. After thermal equilibrium is reached, the temperature of the system is recorded as T₁. The calorimeter is then placed in a room maintained at 20 °C, and the temperature of the whole system falls to 30 °C after exactly 10 minutes. The cooling follows Newton’s law of cooling, dT/dt = –k(T – T_room), where k is the overall heat‑transfer coefficient (in s⁻¹).
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This is Neco Model Questions Vol1 2024 Physics Question 8. It is one of the essay questions from the 2024 Neco Model Questions Vol1 Physics examination.
The question covers Heat, Specific heat capacity, Calorimetry, Newton's law of cooling, Thermal equilibrium .
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