Question detail

A substance has a specific heat capacity of 4200 J/kg°C. How much energy is required to raise the temperature of 2 kg of this substance by 5°C? Show your calculations (Temperature changes in a system and specific heat capacity)

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

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Question

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Style

Topic

Internal energy and energy transfers

Question

A substance has a specific heat capacity of 4200 J/kg°C. How much energy is required to raise the temperature of 2 kg of this substance by 5°C? Show your calculations (Temperature changes in a system and specific heat capacity)

Answer

The energy required is 42000 J.

Explanation

Application lens: Apply the rule to the specific sample or situation instead of reciting a broad fact. This question asks: A substance has a specific heat capacity of 4200 J/kg°C. How much energy is required to raise the temperature of 2 kg of this substance by 5°C? Show your calculations (Temperature changes in a system and specific heat capacity). The correct response is The energy required is 42000 J., 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 apply MS 3b and MS 3c skills when rearranging and calculating with the specific heat capacity equation. 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 355 is distinct because it uses this exact question context and the application lens rather than a generic particle-model sentence.

Common mistake

Confusing Specific Heat Capacity with Thermal Energy

Students often confuse specific heat capacity with the total thermal energy transferred, thinking they are the same concept.

Remember that specific heat capacity is the energy required to raise the temperature of one kilogram of a substance by one degree Celsius, while thermal energy is the total energy transferred in a process.

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A substance has a specific heat capacity of 4200 J/kg°C. How | AQA Physics | ExamCompanion