Question detail

If 500 J of energy is used to heat 2 kg of water, and the specific heat capacity of water is 4,200 J/kg°C, what is the temperature change of the water (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

Type

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Style

Topic

Internal energy and energy transfers

Question

If 500 J of energy is used to heat 2 kg of water, and the specific heat capacity of water is 4,200 J/kg°C, what is the temperature change of the water (Temperature changes in a system and specific heat capacity)

Answer

The temperature change of the water is 0.03°C.

Explanation

Practical lens: Link apparatus, readings, and uncertainty to the exact measurement named in the objective. This question asks: If 500 J of energy is used to heat 2 kg of water, and the specific heat capacity of water is 4,200 J/kg°C, what is the temperature change of the water (Temperature changes in a system and specific heat capacity). The correct response is The temperature change of the water is 0.03°C., 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 identify change in thermal energy in joules, mass in kilograms, specific heat capacity in joules per kilogram per degree Celsius and temperature change in degrees Celsius. 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 290 is distinct because it uses this exact question context and the practical lens rather than a generic particle-model sentence.

Common mistake

Confusing Units of Measurement

Students often confuse joules (J) with kilograms (kg) when identifying change in thermal energy and mass.

Always remember that thermal energy is measured in joules (J) and mass is measured in kilograms (kg). Use the correct units for each quantity when solving problems.

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