Neco Model Questions Vol1 2018 Physics Question 8

Practice essay / theory question 8 from the 2018 Neco Model Questions Vol1 Physics examination. This question covers Heat .

Neco Model Questions Vol1 2018 Physics Essay / Theory

Topic: Heat

Question 8 NECO_MODEL_QUESTIONS_VOL1 • 2018 • PHYSICS • essay

A 150 g block of copper initially at 150 °C is gently placed into a well‑insulated calorimeter that contains 200 g of water at 25 °C. The calorimeter itself has a heat capacity of 0.50 kJ °C⁻¹. After the system reaches thermal equilibrium the final temperature is 30 °C. It is known that 5 % of the heat released by the copper is lost to the surroundings during the process.

Question Parts

( a )

Determine the specific heat capacity of copper (in J kg⁻¹ °C⁻¹) taking the 5 % heat loss into account.

( b )

If the copper block is replaced by an unknown metal of the same mass and the same initial temperature, and the calorimeter now records a final temperature of 45 °C with **no** heat loss, determine the specific heat capacity of the unknown metal (in J kg⁻¹ °C⁻¹).

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About This Question

This is Neco Model Questions Vol1 2018 Physics Question 8. It is one of the essay questions from the 2018 Neco Model Questions Vol1 Physics examination.

The question covers Heat .

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