Draw out the Lewis structures of these reactants and products and apply the analysis indicated in the instructions. 2Fe(s) + 3S(s) --> Fe₂S3

Q: In the following oxidation/reduction reaction identify  the species that is oxidized: 2Mg(s) + O2(g)…

A:

Q: 9. Complete and balance the following equation (include correct physical state of each product)-…

A:

Q: TaO, is very unlikely to exist, but let's pretend that it does. Write the balanced chemical equation…

A: Answer:- This question is answered by using the simple concept of balancing the redox reaction.

Q: Calculate the enthalpies of formation, AH;, of group 1 chloride compounds from their elements by…

A:

Q: 21.1 g of magnesium metal is burned in air to produce magnesium oxide, which is then dissolved in…

A: Mass of magnesium =21.1g Volume of water=1.89L Concentration of hydroxide=?

Q: Which of the following reactions is likely to be product favored based on energetic considerations?…

A: There are mainly two types of reactions.Exothermic reactions: These are reactions in which the…

Q: Which of the following has the lowest first ionization energy? Rb Si P Al S

A: as along the period the first ionisation increases and along with the group the first ionisation…

Q: The first four ionization energies of an element X are 578, 1817, 2745, and 11,577 kJ·mol–1. What is…

A: The number of valence electrons can be found in the element X using the ionisation energies  Since…

Q: Based on the bond energies for the reaction below, what is the enthalpy of the reaction? HC≡CH (g) +…

A:

Q: 1) what are the oxidation state for the reactants As and Cl in this reaction? 2 As (s) + 3 Cl2 (g)…

A: Oxidation number, which is also termed as oxidation state, is type of hypothetical charge present on…

Q: Draw the Lewis structure for the tribromide  Br−3  ion.

A:

Q: Find the oxidation numbers of N

A:

Q: Write the empirical formula for at least four ionic compounds that could be formed from the…

A: Given,The ions:PO43-, CrO42-, Fe3+ and Pb4+

Q: When aluminum combines with non-metals, it always has an oxidation number of +3. What 3 electrons…

A:

Q: How many electrons are in the Lewis structure of a nitrite ion, NO2-?     18     17     16…

A:

Q: what is the enthalpy change when 45.7 grams of dinitrogen tetraoxide form?  2 NO2 (g)   →    N2O4…

A: Enthalpy change is the change in energy of the reaction.

Q: Which may form +1 or +3 ions, depending on the conditions? A) gold  B) postassium C) silicon

A: Transition metal placed between s-block and p-block elements and they are termed as d block…

Q: 3H2   +  N2    =>  2NH3

A: Exothermic reactions are those chemical reactions which occur with evolution of heat.Endothermic…

Q: The Ka for HF is 7.0 x 10-4. Kh for the fluoride ion is O 1.6 x 103 O 1.4 x 10-11 O 7.0 x 10-18 O…

A: Ka is the acid dissociation constant and Kb is the base dissociation constant.  Higher value of Ka…

Q: Consider the following data for molybdenum: atomic mass 95.94 mol electronegativity 2.16 kJ 71.9 mol…

A: Given  Electron Affinity = 71.9 kJ/mole Ionisation energy =684.3 kJ/mole

Q: Calculate the standard enthalpy of formation of the M2O(s) metal oxide (AH+ in kJ/mol) using the…

A: The enthalpy change for the reactants to the products is the same whether the process occurs in a…

Q: How many kj of heat are needed to produce 6.47 g NH 3 ? 4NO+6H 2 O 4NH 3 +5O 2; triangle H=906 kJ

A: From given data,  mass of NH3  = 6.47 g                  ∆H = 906 kJ   Also, molar masses are…

Q: 2. Calculate AH® for the reactions represented by the following equations: m (a) 2 H,(g) + 0,(g)→2…

A: It's a multiple part question.

Q: 6. Define the term disproportionation reaction and explain why the reaction 2 H₂O₂ → H₂O + O2 is a…

A:

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.