What is the mass of a silver statuette, when it is heated at 20 ° c, 1 kJ of energy is expended?

Problem data: Δt (temperature change of the silver figurine) = 20 ºС; Q (consumed thermal energy for heating the figurine) = 1 kJ = 1 * 10 ^ 3 J.

Reference values: Cc (specific heat of silver) = 250 J / (kg * K).

The mass of a silver figurine can be expressed from the formula for calculating heat: Q = Cc * m * Δt and m = Q / (Cc * Δt).

Let’s calculate: m = 1 * 10 ^ 3 / (250 * 20) = 0.2 kg (200 g).

Answer: The weight of the silver figurine is 200 grams.