When 400 g of liquid was heated at 20 J / kg s, a heat quantity of 12 kJ was required to determine

When 400 g of liquid was heated at 20 J / kg s, a heat quantity of 12 kJ was required to determine the specific heat capacity.

Initial data: m (mass of heated liquid) = 400 g (0.4 kg); Δt (change in fluid temperature) = 20 ºС; Q (required amount of heat) = 12 kJ (12 * 10 ^ 3 J).

The specific heat capacity of a liquid can be expressed from the formula: Q = Czh * m * Δt, whence Czh = Q / (m * Δt).

Calculation: Czh = 12 * 10 ^ 3 / (0.4 * 20) = 1500 J / (kg * K).

Answer: The specific heat of the heated liquid is 1500 J / (kg * K).