calculate the heat of formation, AH°f , of P4O10.

Q: Suppose that the reaction of 2.172 moles consumes 3.21 kJ of heat. What is the molar enthalpy of the…

A: The answer to the following question is :

Q: Nitric acid is often manufactured from the atmospheric gases nitrogen and oxygen, and hydrogen…

A: The balanced reaction of the formation of 9 kg HNO3 and theoretical yield -  NH3g +2O2g →HNO3g…

Q: The meals-ready-to-eat (MREs) in the military can be heated on a flameless heater. You can purchase…

A: Recall the given reaction,                            Mg s  +  2 H2O l  →  MgOH2 s  +  H2 g45 mL…

Q: 8. What is the best fuel? Order the three samples according to the amount of heat released when 1.00…

A: General formula to calculate heat released in a combustion reaction in a calorimeter ----

Q: when hydrogen and oxygen are burned to produce water. heat is produced at 58 kcal mol of water. A…

A: We are given with the heat produced for 6.02×10-23 molecules = 58 KCal. So , to find heat produced…

Q: How much heat (in kJ) is absorbed in the process of making 0.877 mol of CF, from the following…

A: The given chemical reaction is as follows,C(s)+2F2(g)→CF4(g)       ∆H° =141.3 kJmolnumber of moles…

Q: In an industrial process to produce ammonia (NH3); nitrogen, N2, reacts with hydrogen, H2, the…

A: The reactants given are N2 and H2 and the product is NH3  Hence the reaction is  N2 + H2 ------>…

Q: How many grams of C5H12

A: ∙Given:- mass =1.24kg or 1240g                    T1 Initial temperature=23.6°C…

Q: Enter your answer in the provided box. Calculate the heat (in kJ) associated with 341 g of white…

A: We will first require to convert grams of white phosphorus to moles. Number of moles=MassMolar mass…

Q: Write the chemical equation for the enthalpy of formation reaction for BaCO3 (s).

A: The formation of compounds from its atoms in their stable sates at standard pressure and temperature…

Q: Using the enthalpy change of -1594 kJ, what is the amount of heat absorbed or released when 1.10 L…

A:

Q: The meals-ready-to-eat (MREs) in the military can be heated on a flameless heater. You can purchase…

A:

Q: What is the final temperature when a 5.0 g sample of brass initially at 25 oC absorbs 75 J of heat?…

A: Equation for finding the heat absorbed by brass is as follows. Q=mc∆TQ=heat absorbed by brassm=mass…

Q: Using standard heats of formation from Appendix C of your text, calculate the standard enthalpy…

A: We are required to calculate the standard enthalpy change for all the given reaction and to predict…

Q: __P4(s) + __Cl2(g) ® __PCl5(g) ΔH°rxn = –1500 kJ          The reaction is _____thermic, heat flows…

A: Balanced Reaction is, P4(s) + 10Cl2 (g)  ----> 4PCl5(g)   ΔH°rxn = –1500 kJ          The reaction…

Q: How much did our sodium-in-water demonstration raise the temperature of water in the dessicator jar?…

A: The objective of the question is to find out how much the sodium-in-water demonstration raised the…

Q: Using values from Appendix C in your textbook, calculate the standard enthalpy change when gaseous…

A:

Q: A student performed the procedure described in the lab manual using 49.9 mL of 1.0 M HCI and 49.3 mL…

A: Molarity of HCl = 1.0 MVolume of HCl: 49.9 mLMolarity of NaOH = 1.0 MVolume of NaOH = 49.3 mLInitial…

Q: he enthalpy change for the reaction of hydrogen gas with iodine to produce hydrogen iodide is 53.1…

A: Given reaction is,   H2(g)   +   I2(s)   ----->  2 HI(g)     ΔH = 53.1 kJ

Q: The reaction between nitrogen and oxygen gases require the absorption of 43 kJ of energy per mole of…

A:

Q: Assuming that 1.00 ng of H2O molecules assembled in a way that made of 18 water molecules at the…

A: Given: mass of H2O = 1.00 ng molar mass of H2O = 18.0 g/mol Heat energy released = 2.0×10-6 J

Q: 3. Write out the chemical equation for the enthalpy of formation of NaCl(s).

A: NaCl is formed by reaction of Na(s) ans Cl2(g). With the help of this reaction we can calculate…

Q: (a) Consider the hypothetical element X. XO reacts with hydrogen gas to form XH;OH. Calculate the…

A: Here we have to find out the enthalpy of the reaction of XO with the hydrogen gas to form XH3OH.  XO…

Q: on 22 of 22 Using the balanced chemical equation, determine how many moles of NaCl will be produced,…

A: According to the question, The given reaction is, BaCl2aq + Na2SO4aq → BaSO4s + NaClaq The moles of…

Q: Write a standard enthalpy of formation reaction for calcium carbonate.  Be sure to include the…

A:

Q: The following reaction is endothermic. KCIO4(s) K(s) + 1/2 Cl₂(g) + 2 0₂(g) AH(1) = 433 kJ Calculate…

A: Recall the given reaction,                         KClO4 s  →  K s  +  1/2 Cl2 g  +  2 O2 gThis is…

Q: The specific heat of mercury is 0.140 J/g°C. Calculate the heat necessary to raise the temperature…

A:

Q: Calculate the standard enthalpy change (kJ/mol) for the following process given the enthalpies of…

A:

Q: The evaporation of water is endothermic. What minimum mass of water (in grams) has to evaporate to…

A: We have given the Molar mass of hydrogen = 2.02 g/mole Molar mass of oxygen = 32 g/mole So Molar…

Q: The standard enthalpy change for the following reaction is -56.0 kJ at 298 K. Na(s) + 1/2 H₂(g)…

A: Important points needs to be remember for enthalpy change If a given chemical reaction is reversed…

Q: 3. The heat of the solution of a solid sample was determined using a coffee cup calorimeter that…

A:

Q: The flame in a torch used to cut metal is produced by burning acetylene (C2H2) in pure oxygen.…

A: we have to calculate the mass of acetylene needed to cut through a piece of steel that requires 90.8…

Q: A 1.00 g sample of NH4NO3 is decomposed in a bomb calorimeter.  The temperature of the calorimeter…

A:

Q: What reaction corresponds to the heat of formation of solid Mg(NO3)2

A: The heat of formation: When one mole of the substance is formed by its constituent elements in its…

Q: Determine the energy associated with each of these processes in order to recycle 1.26 mol Cu. The…

A: Total energy required = heat required to raise temperature of Cu from 250C to 1084.50C (q1) + heat…

Q: A student mixes 67.0 mL of a 2.01 M sodium hydroxide solution with 22.4 mL of 6.45 M hydrochloric g…

A:

Q: Measurements show that the enthalpy of a mixture of gaseous reactants increases by 214. kJ during a…

A: GIven: The decrease in enthalpy of a reaction = 214 kJ The work done on the mixture = 62 kJ We have…

Q: Consider the following reaction. (a) Is the reaction exothermic or endothermic? exothermic…

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Q: 7. Calculate the enthalpy of the following reaction. F + HBr H₂O 5 OH Br + + HF HI

A:

Q: 1. 25 g of sodium (Na) is put into 200 mL of water. The reaction between the two produces sodium…

A: Enthalpy change calculated As heat chage(q) of the system.

Q: In an industrial process to produce ammonia (NH3); nitrogen, N2, reacts with hydrogen, H2, the…

A: Ammonia can be produced in an industry with the help of nitrogen and hydrogen gas, and this process…

Q: When O.376 g of sodium metal is added to an excess of hydrochloric acid, 3910 J of heat are…

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.