The Heating Curve of Water | 水的加热曲线

📚 The Heating Curve of Water | 水的加热曲线

Understanding the heating curve of water is a key skill in KS3 science. It shows how ice changes into liquid water and then into steam as heat is added. This article explains each stage of the curve and the particle behaviour behind it.

理解水的加热曲线是 KS3 科学中的一项关键技能。它展示了冰在加热时如何变成液态水，再变成水蒸气。本文将解释曲线的每个阶段及其背后的粒子行为。

1. What Is a Heating Curve? | 什么是加热曲线？

A heating curve is a graph that plots temperature on the vertical axis against time or heat energy added on the horizontal axis. If we heat a sample of ice and record its temperature at regular intervals, we can draw this curve. It helps us identify the melting point and boiling point of a substance.

加热曲线是一张以温度为纵轴、以时间或加入的热能为横轴的图。如果我们加热一块冰并每隔固定时间记录温度，就可以画出这条曲线。它帮助我们确定物质的熔点和沸点。

For water, the curve has a distinctive shape with two flat sections. These flat sections show where water changes state.

对于水，曲线有一个独特的形状，包含两个平坦部分。这些平坦部分显示水发生状态变化的位置。

2. The Three States of Water | 水的三种状态

Before studying the curve, it is useful to recall the three states of water. In the solid state, water is ice. Its particles are closely packed in a regular pattern and can only vibrate in fixed positions.

在研究曲线之前，回忆水的三种状态会很有帮助。固态时，水是冰。冰的粒子紧密排列成规则图案，只能在固定位置振动。

In the liquid state, water particles are still close together but can slide past one another. In the gas state, steam particles are far apart and move freely in all directions.

在液态时，水粒子仍然彼此靠近，但可以相互滑动。在气态时，水蒸气粒子相距很远，向各个方向自由运动。

3. Starting with Ice: Heating a Solid | 从冰开始：加热固体

Suppose we start with ice at -10°C. As we add heat, the temperature of the ice rises steadily. The particles gain kinetic energy and vibrate faster, but they remain in their fixed lattice positions.

假设我们从 -10°C 的冰开始。当我们加入热量时，冰的温度稳步上升。粒子获得动能，振动得更快，但仍保持在固定的晶格位置。Published by TutorHao | KS3 Revision Series | aleveler.com

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