How much heat is needed to raise the temperature of 2.0 kg of water by 15 K (specific heat capacity of water = 4200 J kg⁻¹ K⁻¹)?
Correct answer A. 1.3 × 10⁵ J
Explanation
Q = mcΔT = 2.0 × 4200 × 15 = 1.26 × 10⁵ J ≈ 1.3 × 10⁵ J. Leaving out the mass gives 6.3 × 10⁴ J.
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