The Heat is On: Understanding the Significance of Melting Points Melting point What is Melting point Melting point is a fundamental physical property of a substance, which is defined as the temperature at which a solid substance transforms into a liquid state at atmospheric pressure. This is a critical property because it can be used to identify a pure substance, to determine its purity, and to understand its behavior under varying conditions of temperature and pressure. Melting point is a characteristic property of a substance, which means that it is unique to that substance and does not depend on the size or shape of the sample. However, the melting point may vary slightly depending on the conditions under which the measurement is taken, such as the rate of heating, the size of the sample, and the purity of the substance. Therefore, the melting point of a substance is usually reported as a range of temperatures rather than a single value. The melting point of a subst...
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