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Free energy changes by differential scanning calorimetry: Application to a low energy but metastable form of p-nitrotoluene |
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| Authors: | MJ Richardson NG Savill |
| Institution: | Division of Materials Applications, National Physical Laboratory, Teddington, Middlesex TW11 0LW Gt. Britain |
| Abstract: | With decreasing sample size, a metastable form of p-nitrotoluene persists for increasing periods; for weights of 1 mg or less this form effectively supersedes the stable structure. It is unusual in having a lower enthalpy than the latter but this is offset by a lower melting point and the free energy is indeed greater than that of the stable form. |
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