Question detail
Calculate the change in thermal energy when 3 kg of a metal is heated from 25 °C to 75 °C, with a specific heat capacity of 900 J/kg°C.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Energy changes in a system, and the ways energy is stored before and after such changes
Question
- A. 135,000 J
- B. 150,000 J
- C. 180,000 J
- D. 225,000 J
Answer
135,000 J
Explanation
The correct option is "135,000 J". 135,000 J is right because it directly matches Energy changes in systems: Calculate the change in thermal energy when the temperature of a system changes.. The other options are less suitable because they change the required Physics relationship, confuse the relevant energy store or use a distractor that does not answer the question.
Common mistake
Common Mistake in Thermal Energy Calculation
Students often forget to convert temperature changes into the correct units, leading to incorrect calculations of thermal energy.
Always ensure that temperature changes are in degrees Celsius when using the specific heat capacity equation.
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