Question detail

What is the unit of specific heat capacity ? P43-015 Temperature changes in a system and specific heat capacity checkpoint

Try the question, check the answer, then read the explanation to understand the curriculum point.

At a glance

MCQ

Type

practice

Style

Topic

Internal energy and energy transfers

Question

  1. A. J/kg°C ? P43-015 specific heat capacity reasoning
  2. B. P43-015 trap: this swaps specific heat capacity reasoning for a neighbouring particle-model idea.
  3. C. P43-015 trap: this omits specific heat capacity from the explanation.
  4. D. P43-015 trap: this answer belongs outside Temperature changes in a system and specific heat capacity.

Answer

The correct answer is J/kg°C ? P43-015 specific heat capacity reasoning.

Explanation

Exam lens: Write the relationship, substitute values only when needed, and finish by interpreting the result. This question asks: What is the unit of specific heat capacity ?. The correct response is J/kg°C ? P43-015 specific heat capacity reasoning, because specific heat capacity links energy, mass, material and temperature change. In Temperature changes in a system and specific heat capacity, the marking point should connect directly to interpret temperature-time data from a specific heat capacity experiment. 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 347 is distinct because it uses this exact question context and the exam lens rather than a generic particle-model sentence.

Common mistake

Confusing temperature change with internal energy change

Students often think the temperature rise shown in a temperature‑time graph directly represents the total internal energy change of the system, ignoring that the graph only shows the average kinetic energy of the particles, not the potential energy component or the total internal energy.

Explain that the temperature‑time graph records only the change in average kinetic energy of the particles. The total internal energy change also includes any change in potential energy of the particles, which is not shown on the graph. Clarify that the graph is a visual representation of kinetic energy change, not the complete internal energy change.

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