How much energy is needed to heat 0.5 kg of water by 20 degrees Celsius? The specific heat capacity of water is 4200 J/kg per degree Celsius.
Answer and explanation
Correct answer: C. 42 000 J
- Step 1: Use .
- Step 2: J.
Answer
42 000 J.
Why not the others: 2100 J forgets the temperature change, 4200 J uses a 2 degree change and 84 000 J uses a mass of 1 kg.
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