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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermal ExpansionMedium2 minQB

PhysicsMediumnumerical

Passage / Comprehension

Heat is supplied to a 0°C solid and its temperature is recorded against the total heat given.

A solid at 0°C is heated at a steady rate. Its temperature reaches 60°C after 900 cal, stays at 60°C until 1500 cal, then reaches 100°C after 2100 cal. The relative specific heat of the solid is 0.4. Find the latent heat of fusion in cal/g.

Answer:

16.00

Solution:

Solid: $900 = m (0.4) (60), m = 37.5 g$ . Melting absorbs 600 cal, so $L = \frac{600}{37.5} = 16 cal / g$ . Liquid check: $\frac{600}{37.5 ( 40 )} = 0.4 cal / (g^{\circ} C)$ .

Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion

⏱ 2mℹ️ Source: QB

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