At 127°C, Hgl, undergoes a polymorphic change from the red to the yellow form. The enthalpy of transition is 1250 J mol·l, and the change in molar volume on transition is 5.4 cm? mol1, the red form being the less dense. Calculate the rate of change of transition temperature with pressure at 127°C.

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NMR Spectroscopy

NMR stands for Nuclear Magnetic Resonance in which the study of different molecules is done based on the interaction of radiofrequency electromagnetic radiations with the nuclei of molecules placed in a strong magnetic field. A precise study of spectra of visible light and all bands of electromagnetic radiation is called spectroscopy.