Question detail
A 5 kg block of ice absorbs 21000 J of energy. If the specific heat capacity of ice is 2100 J/kg°C, what is the temperature change of the ice (Temperature changes in a system and specific heat capacity) ? P43-066 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
- A. 2°C ? P43-066 density measurement and calculation
- B. P43-066 trap: this swaps density measurement and calculation for a neighbouring particle-model idea.
- C. P43-066 trap: this omits specific heat capacity, temperature change, thermal energy from the explanation.
- D. P43-066 trap: this answer belongs outside Temperature changes in a system and specific heat capacity.
Answer
The correct answer is 2°C ? P43-066 density measurement and calculation.
Explanation
Graph lens: Read the trend, flat section, gradient, or axis labels before explaining the physical meaning. This question asks: A 5 kg block of ice absorbs 21000 J of energy. If the specific heat capacity of ice is 2100 J/kg°C, what is the temperature change of the ice (Temperature changes in a system and specific heat capacity) ?. The correct response is 2°C ? P43-066 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 mass when thermal energy change, 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 303 is distinct because it uses this exact question context and the graph lens rather than a generic particle-model sentence.
Common mistake
Confusing Mass and Weight
Students often confuse mass with weight, using them interchangeably in calculations related to specific heat capacity.
Remember that mass is measured in kilograms (kg) and is a measure of the amount of matter, while weight is a force measured in newtons (N) and is the gravitational pull on that mass. Always ensure you are using mass in kg when calculating specific heat capacity.
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