Task data: m (mass of taken water) = 250 g (0.25 kg); Δt (required change in water temperature during heating) = 5 ºС.
Reference values: Sv (specific heat of water) = 4200 J / (kg / K).
The thermal energy required for heating 250 g of water is determined by the formula: Q = Cw * m * Δt.
Calculation: Q = 4200 * 0.25 * 5 = 5 250 J.
Answer: To heat 250 g of water at 5 ºС, 5 250 J of thermal energy is required.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.