Question

In an experiment on the specific heat of a metal, a 0.20 kg block of the metal at 150⁰C is dropped in a copper calorimeter (of water equivalent 0.025 kg) containing 150 cm³ of water at 27⁰C. The final temperature is 40⁰C. The specific heat of the metal is –

• A. (a) 0.1 J g^–10C^–1
• A. (b) 0.2 J g^–10C^–1
• A. (c) 0.3 J g^–10C^–1
• A. (d) 0.4 J g^–10C^–1

Answer 1

(a)

Sol. 0.20 × 10³ × c × (150 – 40) = (150 × 1 + 0.025 × 10³)

(40 – 27) Ž c = 0.1 J g^{–1 0}C^–1