A 2 kg block of metal is heated, causing its temperature to rise by 25 °C. If the specific heat capacity of the metal is 450 J/kg°C, calculate the thermal energy change of the block (Temperature changes in a system and specific heat capacity)

The thermal energy change of the block is 22500 J.

Method lens: First identify the measured quantity, then match the equation or particle idea to the command word. This question asks: A 2 kg block of metal is heated, causing its temperature to rise by 25 °C. If the specific heat capacity of the metal is 450 J/kg°C, calculate the thermal energy change of the block (Temperature changes in a system and specific heat capacity). The correct response is The thermal energy change of the block is 22500 J., because density links mass and volume, so the answer must preserve which quantity is being calculated. In Temperature changes in a system and specific heat capacity, the marking point should connect directly to calculate thermal energy change when mass, specific heat capacity and temperature change are known. If the question includes values, the working must keep the appropriate unit and operation; if it is an explanation, it must name the relevant particle behaviour or energy change. This item belongs to Internal energy and energy transfers, so avoid answers that switch to a different quantity, confuse heat with temperature, or describe gas pressure without collisions when collisions are the reason. Checkpoint 296 is distinct because it uses this exact question context and the method lens rather than a generic particle-model sentence.