How much energy is needed to raise the temperature of 0.5 kg of water by 40 °C? (Specific heat capacity of water = 4200 J/kg °C)
Answer and explanation
Correct answer: C. 84000 J
- Step 1: .
- Step 2: J.
Answer
84000 J.
Why not the others: 2100 J: it ignores the temperature rise. 168000 J: it ignores the mass. 84 J: it converts to kJ but keeps the unit J.
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