本题目来源于试卷: Particulate Nature of Matter B.1 Thermal Energy Transfers，类别为 IB物理学
[单选题]
A substance, initialmebp/ ; av9;:6nbhwv mh5d 5 nnjqnp*(l.l50 zf vig.f1/0v5 zsnioc ofy solid of mass 2.00 kg is heated by a 4.0 kW electric heater causing it to melt. During heating, the substance also exchanges heat with its surroundings. The svcozz5n i1 . g.flf o5vi/s00fubstance starts melting immediately and has fully turned to liquid after 400 s. Given that the specific latent heat of fusion of the solid is $900\,kJkg^{−1}$, what is the average rate of heat transfer between the substance and the surroundings in one second?
A. Direction of heat transfer is from the surroundings ; Rate of heat transfer is 500 W
B. Direction of heat transfer is to the surroundings ; Rate of heat transfer is 500 W
C. Direction of heat transfer is from the surroundings ; Rate of heat transfer is 1750 W
D. Direction of heat transfer is to the surroundings ; Rate of heat transfer is 1750 W
参考答案: A
本题详细解析:
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