Based on the Ellingham diagram below, which metal is least stable at 400°C

Q: What is the oxidation number of Na in sodium metal? O+2 00 minus 8 O minus 4 minus 1 O minus 2

A: Sodium metal has [Ne] 3s1

Q: estimate the fraction of electrons above fermi level in sodium and copper at room temperature

A:

Q: S(s, rhombic) + O₂(g) → SO₂(g) At 298 K, AH for this reaction is-269.9 kJ/mol, and AS is +11.6 J/K.

A:

Q: What is Oxide Ceramics? Demonstrate the advantages and disadvantages of ceramic materials compared…

A: Oxide ceramics are inorganic compounds of metals like aluminium, zirconium, titanium etc. or of…

Q: Rank the following in order of increasing electrical conductivity, and explain your ranking: Po, S,…

A: The electrical conductivity represents the ease by which electric current can pass through a…

Q: Silver is the best conductor ofelectricity. Hypothesize why silver is not used forelectric wires if…

A: Silver is a transition metal and has electronic configuration 4d¹° 5s¹ in its ground state. The…

Q: Determine the electronic configuration and orbital diagram for the common oxidation states of…

A: Determine electronic configuration as well as orbital diagram --

Q: For the reaction below: Co(s) + CUNO3(aq) → CONO3(aq) + Cu(s) Answer the following questions: a)…

A: In the above reaction both copper and cobalt are in +1 oxidation state mentioned as reactant and…

Q: What chemical process is used for obtaining a metal from its oxide?

A: The chemical process used for obtaining metal from its oxide:

Q: Select the element whose +2 oxidation state is least stable in water. O Ni Co Ov Zn

A: Hydration energy: when one mole of ionic crystal is dissolved in water the water molecules are…

Q: In addition to interhalogen compounds, many interhalogen ions exist. Would you expect interhalogen…

A: An interhalogen compound is a molecule that contains two or more different halogens that are…

Q: Give two examples of ferromagnetic substances?

A: Two examples of ferromagnetic substances are to be given.

Q: Fluorine exhibit only –1 oxidation state whereas other halogens exhibit +ve oxidation states also.…

A: The given statement is, Fluorine exhibit only –1 oxidation state whereas other halogens exhibit…

Q: Which of the silver halides are the most sensitive to light and would be useful in the photographic…

A: Silver halides are used in the photographic industry because they possess the unique property of…

Q: (AlOOH) ore is the most preferred in aluminum production and hematite in iron production of the…

A:

Q: About 50,000 kJ of electrical energy is required to produce 1.0 kg of Al from its Al(OH)3 ore. The…

A: Calculate the number of moles of aluminum Given mass of aluminum = 1000 g Molar mass of aluminum =…

Q: Consider the reaction I2(g) + Cl2(g)–2ICI(g) Use the standard thermodynamic data in the tables…

A: Equilibrium constant ,K =product of pressure of productsproduct of pressure of reactants  Gibbs free…

Q: Using a band diagram explain why magnesium can be a metal even though its 3s level is full. Please…

A: The atomic number of magnesium is 12.The electronic configuration of Magnesium is written as…

Q: Why alkali metals donot exist as free in nature?

A: Alkali metals are s-block elements or 1A group elements.  These metals have only one electron in the…

Q: <p>Which element has the higher ionization energy, Cu or Au?

A: The elements in a modern periodic table are arranged in an increasing order of their atomic number.…

Q: ite form of iron has fcc crystal lattice structure,whereas its alpha form has bcc crystal lattice…

A: For a Face-Centred Cubic lattice:  4r=2a where r is the radius of the atom and a is the edge length.…

Q: Explain briefly the structure of matters affecting the metallurgy of metals?

A: Metallurgy is the  branch of science and technology of extracting and refining metals from their…

Q: 1. Suggest why it is possible to synthesize many boron-nitride analogs of aromatic carbon compounds,…

A: “Since there are multiple questions and it is not mentioned that which one has to be solved so I am…

Q: The precious metal platinum was first used by indigenous peoples of South America, who found impure,…

A: Various metals are present in the form of coordination compounds. They are attached with various…

Q: The precious metal platinum was first used by indigenous peoples of South America, who found impure,…

A: Since you have posted multiple questions, we will solve first question for you. Please repost other…

Q: Co(NH3)6+3 (Kf = 5.0 x 1031) is more stable as compared to Ag(CN)2 (Kf = 1.0 x1021) True O False

A: The given formation constant values along with the chemical equation are: Co3+(aq) + 6NH3(aq) ⇌…

Q: True or false does CrCl3 form and acidic solution in water?

A: Since on dissolving in water, the reaction takes place is  CrCl3 (aq) + 3 H2O (l) ----> Cr(OH)3…

Q: Strontium crystal has a mass density of 2.64 g/cm' and a molar mass of 87.62 g/mol Estimate the…

A: Answer is explained below.

Q: Electric bulb Y - Dilute sulphuric acid

A:

Q: Which of the following makes the best oxidizing agent? Cu2+ , Pt2+ , Cd2+ , or Al3+ ?

A: Oxidizing agents are those which oxidise other and reduce itself. Reduction is gain of electron.…

Q: Which phosphorus nitride NP ,NP^+or NP^2- would be paramagneti

A: Substance which have a permanent dipole moment known as paramagnetic substance and substances which…

Q: Explain why SO2 is used as a reducing agent but SO3 is not

A: The process in which a species undergoes the loss of electrons is defined as oxidation, whereas the…

Q: Based on the following options, select the substance with hydrogen in the +1 oxidation state.…

A: H2, SrH2 , AlH3 , CH4, KH

Q: How is Vanadium a Problem and an opportunity?

A: Interpretation: How vanadium is a problem and an opportunity is to be determined.

Q: Arrange the following elements in order of decreasing metalic charector O Zn F Al C Sr

A: Metallic character decreases in a period and increases in a group. The given elements are O, Zn, F,…

Q: Rank the following in order of increasing electrical con-ductivity, and explain your ranking: Po, S,…

A: The given elements have to arranged in the order of increasing electrical conductivity, The given…

Q: Formula structure of : Potassium cobalt (II) chromate hydrate

A: Given a compound name potassium cobalt (||)chromate hydrate.  We have to tell the structure of…

Q: In addition to interhalogen compounds, many interhalo-gen ions exist. Would you expect interhalogen…

A: Interhalogen ions are the  group of polyatomic cations and anions that only contain halogen atoms.…

Q: 1. What are the two major metal groups? Define them and name the main sub-categories of each group.

A: Two major groups of metals are 1). Ferrous 2). Non ferrous Ferrous

Q: Which of the following is the correct order of reactivity of metals? Select one: Cu < Ag < Fe < Zn O…

A: To identify: The correct order of reactivity of metals.

Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.    

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.