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比热是物质的一种特性，在实际生产和日常生活中有广泛的应用．现举几例说明．1．鉴别物质例1取100克某种液体，测得它的温度是20℃，把80克的铁块加热到100℃后投进液体里，测出混合后的温度是32℃，请鉴别这是什么液体．〔已知铁的比热是0．46×103焦/（千克·℃）〕分析先利
Specific heat is a characteristic of matter. It has wide application in actual production and daily life. Here are a few examples. 1. Identification Substance 1 Take 100g of a certain liquid. Measure its temperature at 20°C. Heat 80g of iron to 100°C and throw it into liquid. Measure the temperature after mixing is 32°C. Please identify this as What liquid. [The specific heat of iron is known to be 0.46×103 Joules/(kg·°C)]