英语翻译Heat,as a form of energy,cannot be created or destroyed.heat can be transferred from one substance to another.Heat always tends to pass from warmer objects to cooler ones.When a warm substance comes in contact with a cold substance,giving

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英语翻译Heat,as a form of energy,cannot be created or destroyed.heat can be transferred from one substance to another.Heat always tends to pass from warmer objects to cooler ones.When a warm substance comes in contact with a cold substance,giving
英语翻译
Heat,as a form of energy,cannot be created or destroyed.heat can be transferred from one substance to another.
Heat always tends to pass from warmer objects to cooler ones.When a warm substance comes in contact with a cold substance,giving some of its energy to the cold molecules.This is only one way to transfer heat.
In a chemical plant,for example,in a refinery,transfer of heat is very important.The successful operation of most processes is dependent on correct application of the principles of heat transfer.Where we are handling a hot material,we may insulate the system to hold the heat in;where the material is cold,we may insulate to keep the heat out.Efficient equipment,designed to take full advantage of processing heat,is in use in almost all chemical plants.
Three methods of heat transfer are conduction,convention,and radiation.Conduction is the transfer of heat that occurs by direct contact between two objects at different temperatures,or the transfer from one part of an object to another part of the same object,without movement or mixing of particles.
If a silver spoon is placed in a cup of hot coffee ,the handle of the spoon will get hot.Due to the molecular collisions,heat is transferred from the coffee to the spoon.The spoon becomes hot since it gains heat,and the coffee gets a little cooler since it loses some heat.Similarly,when one end of an iron poker is placed in a fire,the other end will get too hot to touch,if,however,one end of a wooden rod is placed in afire the other end will be warmed hardly at all.

英语翻译Heat,as a form of energy,cannot be created or destroyed.heat can be transferred from one substance to another.Heat always tends to pass from warmer objects to cooler ones.When a warm substance comes in contact with a cold substance,giving
热能作为一种能量形式,不能被创造也不能被消灭. 它可以从一个物质传导到另一个物质.
热能总趋向于从较热的物体传递到较冷的物体.当热的物质接触冷的物质,热的一方会把一部分能量传给冷物质的分子.这只是热传递的一种方式.
在一个化工厂, 以精炼厂为例, 热传递是很重要的.大部分工序的正常运转要依靠正确地应用热传递法则.我们处理一种热材料时,我们会将系统隔离, 以保持其热度. 在处理冷材料的情况下,我们会隔离系统, 远离热能.高效的机械用来充分发挥热能机理的作用, 几乎所有化工厂都在使用.
热传递有三种方式：传导、对流、辐射.热传导是指两个不同温度的物体接触而发生热的传递, 或者是物体的一部分向其另一部分传递热, 内部粒子没有发生移动或者混合.

如果一个银勺放到一杯热咖啡里,勺柄会变热.由于分子碰撞,热能从咖啡传导到了勺子.勺子获得热能而变热,咖啡失去一部分热能而便凉一点.类似的,把铁棒的一端放到火里,另一端会变得太热而不敢碰.然而如果把木棒的一端放进火里,另一端几乎不会变热.

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热能作为一种能量，它不能被创造也不能被毁灭。它可以从一个物体传导到另一物体。
热能总是从热的一方传到冷的一方。当一个热的物体接触到一个冷的物体，热的物体会把他的一部分能量传给冷的物体。这是热传递的唯一方法。
在一个化工厂（例如：炼精厂）热传递是很重要的。能成功的运作大部分工序取决于正确的应用热传递的法则。当我们处理热的材料时，我们可能要使系统保温，然而在处理冷的材料时，我们可能要使系统保持寒冷。高效处理热能的机器已经被绝大多数化工厂所使用。
有三种热传递的方法：热传导、热对流、热辐射。热传导传播热能是通过两个不同温度物体的接触或者是从同一物体的一部分传到另一部分但没有运动或者粒子混合的现象。

如果一个银勺放到一杯热咖啡里，勺柄会很快变热。由于分子之间的碰撞，热能从咖啡传导到了勺子。勺子获得了热能会变热，咖啡失去了一点热能会便冷。类似的，当铁做的拨火棒一端放到了火里，另一端会变的热的不敢碰。然而当把木棍一端放到火里，他的另一端确很难变热。
手打的，很辛苦啊

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