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Frost diagram for manganese In electrochemistry , the tendency of two redox species to disproportionate, or comproportionate, can be determined by examining their Frost diagram . It is a graphical plot of nE ° = −Δ G °/ F as a function of the oxidation number for the different redox species of a given element.
Note: This Frost diagram for nitrogen is also incomplete as it lacks azide (N − 3, or hydrazoic acid, HN 3), presented here above in the former Frost diagram for nitrogen. The pH dependence is given by the factor −0.059 m / n per pH unit, where m relates to the number of protons in the equation, and n the number of electrons exchanged.
Frost weathering is a collective term for several mechanical weathering processes induced by stresses created by the freezing of water into ice. The term serves as an umbrella term for a variety of processes, such as frost shattering, frost wedging, and cryofracturing.
Latimer diagrams can be used in the construction of Frost diagrams, as a concise summary of the standard electrode potentials relative to the element. Since Δ r G o = -n F E o , the electrode potential is a representation of the Gibbs energy change for the given reduction.
[4] [5] [6] The CALPHAD approach is based on the fact that a phase diagram is a manifestation of the equilibrium thermodynamic properties of the system, which are the sum of the properties of the individual phases. [7] It is thus possible to calculate a phase diagram by first assessing the thermodynamic properties of all the phases in a system.
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The patterned ground below Mugi Hill on Mount Kenya lies in an area of seasonal frost. [1] A pingo and polygonal ground near Tuktoyaktuk , Northwest Territories, Canada Patterned ground is the distinct and often symmetrical natural pattern of geometric shapes formed by the deformation of ground material in periglacial regions.
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