Question

A molten metal of mass 150 g is kept at its melting point 800oC. When it is allowed to freeze at the same temperature, it gives out 75000 J of heat energy.(a)What is the specific latent heat of the metal?(b) If the specific heat capacity of metal is 200 J kg-1 K-1, how much additional heat energy will the metal give out in cooling to -50oC?

Name: a molten metal of mass 150 g is kept at its melting point 800oc when it is allowed to freeze at the same temperature it gives out 75000 j of heat energyawhat is the specific latent heat of the metalb
Uploaded: 2022-03-01T11:52:32-08:00
Duration: 3 min 21 s
Channel: Satish Kumar
Description: a molten metal of mass 150 g is kept at its melting point 800oc when it is allowed to freeze at the same temperature it gives out 75000 j of heat energyawhat is the specific latent heat of the metalb

          A molten metal of mass 150 g is kept at its melting point 800oC. When it is allowed to freeze at the same temperature, it gives out 75000 J of heat energy.(a)What is the specific latent heat of the metal?(b) If the specific heat capacity of metal is 200 J kg-1 K-1, how much additional heat energy will the metal give out in cooling to -50oC?

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University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Satish Kumar

03/01/2022

Step 1

Given: Heat energy (Q) = 75000 J Mass (m) = 150 g = 0.15 kg Use the formula for specific latent heat: \[ Latent\ heat = \frac{Q}{m} = \frac{75000}{0.15} = 500 \ J/g \] Show more…

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A molten metal of mass 150 g is kept at its melting point 800oC. When it is allowed to freeze at the same temperature, it gives out 75000 J of heat energy.(a)What is the specific latent heat of the metal?(b) If the specific heat capacity of metal is 200 J kg-1 K-1, how much additional heat energy will the metal give out in cooling to -50oC?