Neco 2017 Physics Question 8

Practice essay / theory question 8 from the 2017 Neco Physics examination. This question covers Heat .

Neco 2017 Physics Essay / Theory
Topic: Heat
Question 8 NECO • 2017 • PHYSICS • essay

A 2.0‑kg block of copper (specific heat capacity 0.385 kJ·kg⁻¹·K⁻¹) at 150 °C is placed in a well‑insulated container that already contains 3.0 kg of water at 25 °C. The specific heat capacity of water is 4.18 kJ·kg⁻¹·K⁻¹. No heat is lost to the surroundings.

Question Parts

( a )
Write the energy‑balance equation for the final equilibrium temperature \(T_f\) of the system.
( b )
Determine the value of \(T_f\) (in °C) to one decimal place.
( c )
After equilibrium is reached, 0.5 kg of ice at 0 °C is added. Assuming the ice melts completely and the resulting mixture reaches a new equilibrium temperature, calculate this final temperature (in °C) to one decimal place. (Latent heat of fusion of ice = 334 kJ·kg⁻¹.)
( d )
Explain why the assumption of no heat loss is more realistic in this experiment than in the water‑tank experiment of Question 7.

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About This Question

This is Neco 2017 Physics Question 8. It is one of the essay questions from the 2017 Neco Physics examination.

The question covers Heat .

View More Neco 2017 Physics Questions More Neco Practice Questions Back to Questions

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