If a 4 kg object absorbs 1600 J of energy and its temperature increases by 20 °C, what is the specific heat capacity of the object (Temperature changes in a system and specific heat capacity) (Temperature changes in a system and specific heat capacity; particle reasoning focus: Calculate specific heat capacity when energy change, mass and temperature change are known) (Temperature changes in a system and specific heat capacity; particle reasoning focus: Calculate specific heat capacity when energy change, mass and temperature change are known) ? P43-045 Temperature changes in a system and specific heat capacity checkpoint

The correct answer is 20 J/kg°C ? P43-045 density measurement and calculation.

Particle lens: Describe arrangement, motion, spacing, collisions, or energy changes only when they are relevant here. This question asks: If a 4 kg object absorbs 1600 J of energy and its temperature increases by 20 °C, what is the specific heat capacity of the object (Temperature changes in a system and specific heat capacity) (Temperature changes in a system and specific heat capacity; particle reasoning focus: Calculate specific heat capacity when energy change, mass and temperature change are known) (Temperature changes in a system and specific heat capacity; particle reasoning focus: Calculate specific heat capacity when energy change, mass and temperature change are known) ?. The correct response is 20 J/kg°C ? P43-045 density measurement and calculation, 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 specific heat capacity when energy change, mass 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 312 is distinct because it uses this exact question context and the particle lens rather than a generic particle-model sentence.