1. Given the following thermochemical data at 25°C and 1 atm pressure, 3 02(g) + 2B(s) → B2O3(s) AH°=-1264 kJ 03(g) + 2B(s) → B2O3(s) AH° = -1406 kJ determine AH° for the following reaction at 25°C and 1 atm pressure. 203(g) → 302(g)

Q: Given the following thermochemical equations, AH° = -1132 kJ 4NH3(g) + 702(g) → 4NO2(g) + 6H2O(3)…

A: To calculate the ∆Ho for the given reaction , by using the given ∆Ho for above two reactions , we…

Q: For the reaction I2(g) + Cl2(g) – 2 ICI(g) AG° = -30.3 kJ and AS° = 11.4 J/K at 310 K and 1 atm.…

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Q: Determine the standard enthalpy of formation (AH°t) for NO2(g) given the information from the…

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Q: Given the following data, AH°(kJ/mol). S(s) + O2(g) S(g) + O2(g) - SO2(g) -395 SO2(g) -618 - find…

A: The given chemical reactions are: S(s) + O2g → SO2g     ∆H° = -395 kJ/molSg + O2g → SO2g     ∆H° =…

Q: For the complete combustion of 1.000 mole of ethane gas at 298 K and 1 atm pressure, ΔH° = -1560…

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Q: Given: 4AICI3(s) + 302(g) → 2Al,03(s) + 6C12(g); AH =- 529.0 kJ determine AH for the following…

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Q: What is the change in heat, in kJ, at 25 °C and 1 atm for the reaction of 2.00 mol of solid iron…

A: Since for the above reaction, ΔH° is the amount of heat change when 4 moles of Fe reacts at standard…

Q: How much heat is absorbed in the comp eaction of 3.00 grams of SiO2 with ex arbon in the reaction…

A: Mole is equal to weight of substance divide by it's molar mass

Q: Phosphorus pentachloride is used in the industrial preparation of organic phosphorus compounds.…

A: When a thermochemical equation is reversed then ∆H changes its sign When a thermochemical equation…

Q: Elemental iron is used in heat packs and the reaction can be represented as: 4 Fe(s) +3 O2(g) → 2…

A: When enthalpy is negative that means reaction is exothermic reaction

Q: The value of AH° for the reaction below is -482 kJ. Calculate the heat (kJ) released to the…

A: 2 CO (g) + O2 (g) →2 CO2 (g) The enthalpy of reaction ∆H° = - 482 KJ   From the above given…

Q: 25.0 mL of 1.00 M HCl at 23.5oC react with 25.0 mL 1.00 M NaOH in a styrofoam calorimeter whose…

A: The energy of a system is always conserved. The amount of heat released or absorbed by the reaction…

Q: 1.85 x 10 kJ 59,400 kJ 3.71 x 10 kJ 48.Determine the heat given off to the surroundings when 9.0 g…

A: Number of moles of Aluminum = 9.0 g/ 26.9815 g/mol…

Q: 72. Given: Fe2O3(s) + 3C0(g) → 2Fe(s) + 3CO2(g); AH° = -26.8 kJ FeO(s) + CO(g) → Fe(s) + CO2(g); AH°…

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Q: Calculate the enthalpy for this reaction: 2C(s) + H2(g) ---> C2H2(g) ΔH° = ??? kJ Given the…

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Q: According to the following thermochemical equation, if 586.9 g O, is formed how much heat is…

A: Answer - According to the question - Given reaction  CO2 +(g) + 1/2H2O (l) ----- -> 1/2 C2H2 (g)…

Q: Given the data below, H°rxn for the reaction 2502 (g) + O2 (g) → 2SO3 (g) is kJ. AH°; (SO2 (g)) =…

A: Given  Reaction   2SO2(g)  + O2(g)   →  2SO3(g) ∆H°f ( SO3(g) )   = - 396 KJ/mol  ∆H°f ( SO2(g) )…

Q: For the reaction 2 CO(g) + O2(g) –2 CO2(g) AG° = -522.4 kJ and AS° = -173.1 J/K at 252 K and 1 atm.…

A: ∆G is negative reaction will go in forward direction or product side You are given a relation and…

Q: Given the following thermochemical equations, 4NH3(g) + 702(g) → 4NO2(g) + 6H2O(g) 6NO2(g) + 8NH3(g)…

A: The enthalpy change is a state function and the Hess law states that the change of enthalpy in a…

Q: Given the following thermochemical equations: 2NO(g) + O2(g) –→ 2NO2(g) AH° = -113.2 kJ %3D 2N,0(g)…

A: Calculate change enthlpy of the given reaction above----

Q: 25.0 mL of 1.00 M HCl at 23.5oC react with 25.0 mL 1.00 M NaOH in a styrofoam calorimeter whose…

A: Heat of neutralisation of an acid id defined as the amount of heat evolved when one equivalent of an…

Q: For the reaction H2(g) + C2H4(g) C2H6(g) G° = -97.2 kJ and S° = -120.7 J/K at 330 K and 1…

A: In this reaction hydrogen is react with the ethene and form ethane as a product. This reaction is…

Q: Calculate the change in enthalpy when 2.00 g of Fe at 25°C and 1 atm pressure is oxidized.  (∆H…

A: The enthalpy change for the given reaction (ΔrH) is same as enthalpy of formation (ΔfH) of 1 mole of…

Q: In the recovery of iron from iron ore, the reduction of the ore is actually accomplished by…

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Q: Given the following thermochemical data at 25°C and 1 atm pressure, 3/2 02(g) + 2B(s) = -1264 kJ; -…

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Q: A solid 30.2 cm block of KCIO, is heated in the laboratory and decomposes according to the following…

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Q: Determine the enthalpy for the reaction shown below. CS2(l)  +  3O2(g)  -->  CO2(g)  +  2SO2(g)…

A: In this question, we have to find out the correct answer of given problem by the help of…

Q: Given the following data: 203(g) 302(g) O(g) 20(g) NO(g) + 0;(g) → NO,(g) + 0,(g) AH=-427 kJ AH=…

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Q: Determine the enthalpy of reaction for P4010(s) + 6PCIs(g) - 10POCI3(g) ->> P4(s) + 6Cl₂(g) ->>…

A: we have to calculate the enthalpy of reaction, P4O10 + 6PCl5 ----> 10POCl3       ∆H° = ?

Q: When one mole of HgO(s) decomposes to form one mole of Hg(1) and ½ mole of O2(g) the change in…

A: Answer:- This question is answered by using the simple concept of calculation of heat change using…

Q: Calculate the enthalpy for this reaction: | 2C(s) + H2(g) ---> C2H2(g) AH° = ??? kJ Given the…

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Q: 1. What is the standard enthalpy of formation (AH) of HI given the following chemical equation? X…

A: 2HI(g) ---> H2(g) + I2(s)  ∆H°rxn = -53.0 kJStandard enthalpy of formation of HI (∆H°f(HI)) =…

Q: For the reaction 2C2H6(g) + 702(g)4CO2(g) + 6H2O(g) AH° = -2855.4 kJ and AS° = 92.7 J/K The standard…

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Q: The value of AH° for the reaction below is -186 kJ. Calculate the heat (kJ) released from the…

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Q: Calculate ΔH for the reaction; 4NH3(g) + 5O2 (g) => 4NO (g) + 6H2O (g) , from the following data.…

A: Given that:           △H for the formation of 2 mol NO (g) = - 180.5 KJ△H for the formation of 2 mol…

Q: What is the AH°rxn for the reaction of gaseous ammonia and oxygen gas to form gaseous nitrogen…

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Q: Given the following thermochemical data at 25°C and 1 atm pressure, 3/2 O2(g) + 2B(s) → B2O3(s); AH°…

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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.