It is known that the melting point of gold is at 1064 °C. Given that the specific latent heat of fusion of gold is 63 kJ/kg
(a) What is the amount of heat needed to melt 15 kg of solid gold at 1064 °C?
(b) If heat is supplied at a rate of 10000 J/min, how long will it take to melt 15 kg of solid gold at 1064 °C?
先给你翻译一下吧。已知金属金的熔点是1064 °C，在熔化时的潜热63 kJ/kg。（其实潜热就是物质在发生相变的时候放出或吸收的热。）（a）15 kg 黄金在1064 °C熔化时需要吸收多少热量？就是用质量乘以潜热=15*63=945kJ（b）如果加热功率为10000 J/min，那么15 kg 黄金在1064 °C熔化时需要多少时间？...
