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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermal ExpansionEasy2 minQB

PhysicsEasyinteger

Ice is heated at a constant rate for 10 min. For the first 2 min its temperature rises uniformly, it then stays constant for 5 min, and then rises uniformly for the last 3 min. $L_{f} = 336 \times 1 0^{3} J / kg$ and $c_{w} =$ $4200 J / (kg K)$ . Find the final temperature in °C.

Answer:

Solution:

Melting takes 5 min, so the supply is $\frac{336000}{5} = 67200 J$ per kg per min. In 3 min the water gains $201600 J / kg$ , so $Δ T = \frac{201600}{4200} = 4 8^{\circ} C$ .

Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion

⏱ 2mℹ️ Source: QB

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