Mercury temperature range
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Mercury Temperature Range: Insights from Recent Research
Volume and Thermal Expansion of Mercury (0–150°C)
Research has developed a relation to study the volume and thermal expansion of mercury as a function of temperature, specifically in the range of 0–150°C and pressure range of 0–8 Kbar. The findings indicate that the volume of mercury becomes a linear function of temperature at pressures of 6 Kbar and above, with a maximum discrepancy in volume calculations of 2×10⁻⁵ C.C. .
Tracer Diffusion in Mercury (283–333 K)
Studies on the diffusion coefficients for metals diffusing in mercury, particularly cadmium and zinc, have been conducted over the temperature range of 283–333 K. These measurements are crucial for techniques like amalgam polarography, and the classical open-ended capillary technique was used to remeasure self-diffusion coefficients in liquid mercury within this temperature range .
Solubility of Mercury Vapor in Water (5–60°C)
The solubility of mercury vapor in water has been measured over the temperature range of 5–60°C under atmospheric pressure. The solubility follows Henry’s law at each temperature, and the heat of the solution of mercury vapor in water is found to be -5.3 kcal/mol. The relationship between the Henry coefficient and solution temperature allows for the estimation of solubilities at higher temperatures (70–100°C) .
Structural Changes in Mercury (−36°C to 250°C)
X-ray diffraction patterns of mercury have been obtained at temperatures ranging from −36°C to 250°C. The results show shifting and broadening of the maxima with increasing temperature, indicating structural changes. A small subsidiary peak, which changes position more rapidly with temperature, was also observed .
Planet Mercury's Surface Temperature
Observations of the planet Mercury's radio emissions have provided insights into its surface temperature. The mean disk temperature is about 400 K, with the sub-solar point estimated to be approximately 1,100 K. The dark hemisphere, assumed to be close to zero, significantly influences these temperature estimations . Further studies have measured the dark-side temperature of Mercury to be around 111 K, indicating similarities in thermal inertia between Mercury and the moon .
Ultrasonic Absorption in Liquid Mercury (25–130°C)
Ultrasonic absorption and velocity in liquid mercury have been measured at frequencies of 90, 150, and 270 Mc/sec over the temperature range of 25–130°C. The measured values exceed the classical values, attributed to volume viscosity, with the most probable value of (\eta_v/\eta_s) being approximately 0.45 .
Complete Volumetric Behavior of Mercury (0 K to 1733 K)
An extensive study has presented the complete volumetric behavior of mercury over its entire solid and liquid temperature range, from 0 K to its critical point at 1733 K. The data unify microscopic and macroscopic measurements, providing a comprehensive understanding of mercury's behavior across a wide temperature spectrum .
Mercury Melting Line (−38.834 to 0.023°C)
The equilibrium pressure for the melting and freezing of mercury has been observed over the temperature range of −38.834 to 0.023°C using the latent heat method. The corresponding pressure range was 0.14–757.32 MPa, with a standard deviation of 0.055 MPa for pressure expressed as a third-order polynomial in temperature .
Experimental Studies of Mercury Molecules (400–1000 K)
Fluorescence spectra in pure mercury vapor have been studied over the temperature range of 400–1000 K. Absorption measurements were made over the spectral range of 253–334 nm, revealing both structured and continuum bands. These studies also included experiments with mercury vapor–noble gas mixtures at pressures up to 1 atm .
Conclusion
The temperature range of mercury has been extensively studied across various contexts, from its thermal expansion and diffusion properties to its solubility in water and structural changes. These studies provide a comprehensive understanding of mercury's behavior over a wide range of temperatures, from cryogenic conditions to its critical point.
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