Define the open end of a melting point capillary tube

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Why does sealing the open end of a melting point capillary tube allow you to measure the melting point of a compound that sublimes?

Reference no: EM13191163

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Define the open end of a melting point capillary tube : the open end of a melting point capillary tube allow you to measure the melting point of a compound that sublimes?
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