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在现有文献中收录的Na2 CrO4 熔点数据各不相同 ,有 792℃、392℃ ,两者相差 4 0 0℃左右。利用热分析法观测Na2 CrO4 熔点 ,确定其熔点应为 792℃。并且在 4 19.6℃存在着一个可逆的固 固相变 ,转变焓为 148.6J·g- 1
The melting points of Na2 CrO4 recorded in the existing literature vary from 792 ℃ to 392 ℃, the difference between the two is about 400 ℃. The melting point of Na2 CrO4 was observed by thermal analysis. The melting point of Na2 CrO4 should be 792 ℃. And at 4 19.6 ℃ there is a reversible solid phase transition, the enthalpy of the transition 148.6J · g-1