How many grams of CoHe must decompose according to the following chemical equation to transfer 430| kJ of heat? CeHs(l) – 3 C2H2(g) AH = 630| kJ

Q: Describe the hydrometallurgy process?

A: SOLUTION: Step 1: The method of metal extraction from the ore involving an aqueous solution of salt…

Q: Calculate the enthalpy of combustion per mole when 4.10 g of methane burns in oxygen and 236 kJ of…

A: Enthalpy of combustion means the heat energy is given out when one moles of any substance completely…

Q: What is the oxidation number of C in CCl4?

A:

Q: What is the limiting factor for the preparation of methyl  orange?

A: sodium sulphanilate dihydrate is limiting factor for the preparation of methyl orange.

Q: Calculate the mass of KI needed to saturate 111.11g H,0 at 20° C.

A:

Q: Are CO2, CO, HCl environemetal pollutant? If they are, why?

A: Carbon monoxide is one of the most pollutant gas which harms our environment so badly and it is…

Q: How does lime reduce sulfur dioxide emissions from the burning of coal?

A: Coal is primarily made up of carbon and it  is readily combustible. The colour of coal is…

Q: Calculate the quantity of heat in kJ, associated with a 33.5oC decrease in temperature in a 5.85 kg…

A:

Q: Calculate the quantity of heat in kJ, associated with a 33.5oC decrease in temperature in: 1. A…

A: Given . Mass of aluminum ( m)   =  5.85 Kg                                          = 5.85 × 103…

Q: The standard free energy of formation of cubic silicon carbide (SiC) is 62.8 kJ mol-1 . Determine…

A: The change in free energy is used for the prediction of direction of the chemical reaction at…

Q: Which of the following is not a form of coal? O bituminous O lignite O anthracite O carbonite

A: Given : Which of the given compounds is not a form of coal.

Q: What is meant by the terms homogeneous and homozygous for insulating materials?

A: An insulating material refers to the material that does not allow electricity to pass through it.…

Q: What are the products of K2SO4 and FeCl3?  How do you balance this equation?

A: • We need to determine the products of K2SO4 and FeCl3 and balance the chemical equation.

Q: How many milligrams(mg) of oxygen would it take to oxidize 100 mg of Glucose(C6H12O6)

A:

Q: 1.55 g potassium nitrate is added to a calorimeter containing 100.0 mL. water at 22.50 oC.  The…

A: Given: 1.55 g potassium nitrate is added to a calorimeter containing 100.0 mL water at 22.50 oC.…

Q: Hydrofluoric acid etches glass by reacting with the silica in it according to the following…

A:

Q: Which of the following can complete the reaction below? O Bry/Febry O NBS/PMC₂2 Hy, Pt. Ethanol at…

A: The given reaction is hydrogenation of benzene moiety. Hydrogenation can be done by hydrogen in…

Q: Define the term biodegradable?

A: Fuel fertilizer, compost, and biogas are all made from biodegradable waste. Biodegradable waste…

Q: In an experiment, what volume of O2(g) at 0oC and 760 mmHg is produced when 5A of current is passed…

A: Given that, Temperature = 0oC = 273.15 K Pressure =760 mmHg = 1 atm So this is in STP.  It is known…

Q: Calculate the amount of heat absorbed when 63.5 g of NO is produced. N2g) + O2(g) → 2NO2)…

A: Mass of NO = 63.5 g  ∆Hrxn = 180.5 KJ/mol. The amount of heat absorbed when 63.5 g NO is produced =…

Q: What is the equation for the formation reaction for gaseous hydrazine, N2H4, at 25ºC and 1 atm…

A: Hydrazine is  inorganic compounds.  Molar mass = 32.0452 gmol^-1. It is a colorless flammable liquid…

Q: Use oxidation numbers to show that the production of iron metal from its ore 1Fe2O32 by reaction…

A: Redox reactions are the combination of reduction and oxidation reactions. The type of reaction in…

Q: Which of the following substances will conduct electricity in both of its molten and solid states?…

A: As we know,  electricity is conducts due to free electrons and free ions   Sn is the element which…

Q: In terms of bond energies and thermodynamics, why do we (as a society) make so much CO2?

A: Carbon dioxide (CO2) is a greenhouse gas.  It is mostly released through human activities. It is…

Q: Boron nitride (BN) has a structure similar to graphite, but is a white insulator rather than a black…

A: a) The balanced reaction for the formation of BN is: B2O3(s)+2NH3(g)→2BN(s)+3H2O(l) b) Calculation…

Q: 17. What is the type of the following reaction? 2HgO) 2Hgm + O2(2) The answer is

A: When a compound breaks in two or more smaller substances then such reactions are called…

Q: What is the oxidation state of the C atoms in C6H12O3?

A: Oxidation state or oxidation number refers to the number assigned to the atom of a chemical compound…

Q: What is the oxidation number of C in CCl4?

A: We have to find the oxidation number of C in CCl4.

Q: Which type of coal has the lowest carbon content? A. anthracite B. lignite C. peat

A: The 3 types of coal given are, A) anthracite  B) lignite C) Peat

Q: The oxidation number of C in C₂O₄²⁻ is...?

A: Oxidation number :-        Oxidation number, also called oxidation state. It is the total number of…

Q: Ammonium bromide, along with an oxidizing agent, acts as a biocide to bacteria, algae, and fungi in…

A: Molarity of a solution is calculated by dividing the number of moles of solute by the volume of…

Q: Why do boiling potatoes react to hydrogen peroxide whereas raw potatoes do not?

A: It is an experiment that is performed in the lab.

Q: How much O2 is required for the complete reaction of 45 g of C2H4 to form CO2 and H2O?

A: This is a combustion reaction of Ethene C2H4 as shown below

Q: is kalburo (calcium carbide) can be mix in fermented cow dung to generate fire?

A: Given : Kalburo is added in cow dung to generate fire.

Q: Draw the structure of Na2S4O6 and what is O.N of sulphur in this compound?

A: The structure of Na2S4O6 can be drawn as follows:

Q: Calculate the volume of CO(g) measured at STP than can be obtained by the thermal decomposition of…

A: Given , Thermal decomposition of CaCO3(s) : CaCO3(s) → CaO(s) + CO2(g)     {as thermal decomposition…

Q: 1.55 g potassium nitrate is added to a calorimeter containing 100.0 mL. water at 22.50 oC.  The…

A:

Q: What is the enthalpy value of the reaction 2Pd + O2 = 2PdO?

A: As per our company guidelines we are supposed to answer only one question. Kindly repost other…

Q: How much heat (in kJ) is needed to convert 387 g Fe,03 into pure iron in the presence of excess…

A: Given: The weight of Fe2O3 is 387 g. The given reaction is, 2Fe2O3g+3Cs→4Fel+3CO2g ∆H°=+467.9 kJ

Q: In the following three instances, which choice is greener ina chemical process? Explain. (a) A…

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Q: Which of the following has the largest magnitude and negative Gibbs free energy of formation? O a.…

A:

Q: Which of the metals (Fe, Zn, Mg) will react in an aqueous solution of AL(NO3)3 to produce aluminum…

A: The reactivity of the metals can be described by reactivity series. The reactivity series consist of…

Q: Given the thermodynamic data in the table below, calculate the equilibrium constant (at 298 K) for…

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Q: Calculate the amount of heat absorbed when 100 gaf NO, deomposeit 0 r), N2O3 = 136.02 g/mol 2N,Os…

A: Interpretation-  To determine the amount of heat absorbed  when 10.0 g of N2O5 decomposes into NO2…

Q: What type of reaction is… SO3 (g) + H2O (l) → H2SO4 (aq)

A: When energy given to the system is absorbed the change is an endothermic change. If energy given to…

Q: Write the thermal equation for the following reaction that occur at constant pressure

A: A thermochemical equation is defined as the balanced chemical equation that includes the heat change…

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.