Find the time required to raise the temperature of olive oil of mass 2 kg from 25 °C to 90 °C using a 1500-W heater. The specific heat capacity of the olive oil is 1970 J kg^[-1] °C^[-1]
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Given info : the temperature of olive oil of mass 2 kg from 25°C to 90°C using a 1500 watt heater. the specific heat capacity of olive oil is 1970 J/Kg/°C.
To find : the time required to raise the temperature of olive oil is...
solution : energy dissipated by heater to raise the temperature of olive oil, Q = msΔT
= 2 kg × 1970 J/kg/°C × (90°C - 25°C)
= 2 × 1970 × 65 J
= 256100 J
now the power of heater = energy dissipated by heater/time taken to dissipate the energy.
⇒ 1500 Watt = 256100 J/time
⇒ time = 256100/1500 = 170.73 sec ≈ 171 sec
therefore the time required to raise the temperature of olive oil is 171 sec(approx).
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