Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermal ExpansionMedium2 minQB

PhysicsMediumsingle choice

Passage / Comprehension

The sample follows the ordinary solid-melt-liquid-boil sequence. Mass is unchanged. Use supplied numerical durations, not measurements from a diagram.

A heating experiment uses a 10 g sample heated at 20 W without loss. Solid warming takes 20 s for 40 K; melting plateau lasts 30 s; liquid warming takes 40 s for 40 K; boiling plateau lasts 90 s. What is the ratio $\frac{c _{l}}{c _{s}}$ ?

Options:

Answer:

Solution:

$c_{s} = \frac{20 ( 20 )}{( 10 \times 40 )} = 1 J g^{- 1} K^{- 1}; c_{l} = \frac{20 ( 40 )}{( 10 \times 40 )} = 2 J g^{- 1} K^{- 1}$ . Ratio 2.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion

⏱ 2mℹ️ Source: QB

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