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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoCalorimetryMedium2 minQB

PhysicsMediumsingle choice

A gas heater raises temperature of $1 kg$ of water by $30^{\circ} C$ in $10 min$ . How long will it take the same heater to raise $3 kg$ of oil through the same temperature rise if the specific heat of water is twice that of oil (assuming that there is no heat loss)

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Answer:

Solution:

At constant power, time is proportional to $m c Δ T$ .
$\frac{t _{o}}{t _{w}} = \frac{3 c _{o}}{c _{w}}$
$c_{w} = 2 c_{o}$
$t_{o} = 10 \times \frac{3}{2} = 15 min$

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:Calorimetry

⏱ 2mℹ️ Source: QB

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