The specific latent heat of the fusion of ice is 334 J/g. How much energy is needed to melt 2 kg of ice at 0˚C?
Correct answer: A. 6.68 x 10^5 J
- A. 6.68 x 10^5 J
- B. 6.68 x 10^5 kJ
- C. 668 J
- D. 6688 kJ
Explanation
m=2 kg , L=332J/gQ=mLQ=(2×1000)(332)Q=(2000)(332)Q=664000Q=6.64×105 J
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Thermal equilibrium means that bodies in contact have the same temperature and no net heat flows between them. The topic distinguishes heat from temperature, uses the zeroth law of thermodynamics, and covers heat transfer, specific heat capacity, thermal expansion and the conditions for reaching equilibrium.
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