How much heat is needed to heat 3 kg of gold, if the initial temperature is t1 = 20 degrees

How much heat is needed to heat 3 kg of gold, if the initial temperature is t1 = 20 degrees Celsius, and the final temperature is t2 = 45 degrees Celsius.

Initial data: m (weight of gold) = 3 kg; t1 (initial temperature of gold) = 20 ºС; t2 (final temperature of gold) = 45 ºС.

Reference data: C (specific heat of gold) = 130 J / (kg * K).

The required amount of heat is calculated by the formula: Q = C * m * (t2 – t1).

Let’s calculate: Q = 130 * 3 * (45 – 20) = 130 * 3 * 25 = 9750 J or 9.75 kJ.

Answer: To heat 3 kg of gold, you need 9.75 kJ of heat.