The reaction N2(g) + 3H2(g) -> 2NH3(g) at 400.0°C has an associated heat of reaction -92.22 kJ/mol. What mass of nitrogen should be burned to liberate -65.30 kJ of heat? O 19.83 g O 39.65 g O 39.7 g O 25.25 g

Q: Which number represents the enthalpy change in the reaction? 2 Reaction Coordinate 90 Potential…

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Q: how much nitrogen monoxide is formed if 505 kJ of heat are used in its production? N2(g) + O2(g)…

A: N2(g) + O2(g) ==> 2 NO (g)

Q: Is this reaction exothermic, endothermic, or neither? If you said the reaction was exothermic or…

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Q: When 3 moles of C is formed, what is the change in enthalpy? 3A + 6B + 5 kJ → 2C

A: Answer given below

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Q: Consider the following reaction: 2 PbS (s) + 3 O2 (g) → 2 PbO (s) + 2 SO2 (g) AHxn = -827.4 kJ What…

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Q: How much heat (in kilocalories) is evolved or absorbed in the reaction of 1.00 g of Na with H2O? Is…

A: Given: Mass of Na is 1.00g. The reaction of Na with water can be represented as 2Na(s) +…

Q: Part A Which sample is most likely to undergo the smallest change in temperature upon the absorption…

A: Here option 'c' will be correct option. i.e. 67 g of water sample is the most likely to  undergo the…

Q: Determine how many kilojoules are absorbed when 312 gg of Ca(OH)2Ca(OH)2 reacts via the following…

A: Writing Balanced EquationCaOH2s→CaO+H2Ol                           ∆H=+65.3 KjAccording to…

Q: How many kilojoules of heat will be released when exactly 1 mole of iron, Fe, is burned to form…

A: The reaction for standard enthalpy of formation of Fe2O3 is depicted by equation.

Q: 4. Calculate the heat released when 74.6 grams of SO2 reacts according to the following equation.…

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Q: Consider the reaction: H2(g) + (1/2)O2(g) -------> H2O(l) ΔH° = -286 kJ Which of the following is…

A: Consider the reaction-      H2(g) + (1/2)O2(g) ---> H2O(l) , ∆H=-286kJ  Since the enthalpy(∆H) is…

Q: Use the following data to calculate the standard heat (enthalpy) of formation, ΔH°f, of…

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

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Q: For the reaction H2(g) + 1/2 O2(g) --> H2O(g), DHo = -241.8 kJ. What quantity of heat, in kJ,…

A: Balanced Reaction H2(g) + 1/2 O2(g) --> H2O(g) Here heat is released during the reaction.

Q: When hydrogen and oxygen are burned to produce water, heat is produced at the rate of 58 kcal/mole…

A: Given: Heat produced per mole of water = 58 Kcal/mol of water. And 1 mole of water contains = 6.02 ×…

Q: Among the substances that react with oxygen and that have been considered as potential rocket fuels…

A: Standard enthalpy change is defined as the heat absorbed or released by the system during chemical…

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

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Q: if 124 KJ of heat is absorbed in a reaction that forms nitric oxide from nitrogen and oxygen what…

A: The following information given in the question - The heat absorbed for NO produced = 124 kJ   The…

Q: Determine the total heat absorbed by the reaction, in kJ, if 2.50 g of O2 is required to fully…

A: Heat absorbed by the reaction = 89.4kJ.mol The heat of Formation of SO3(g) = -204.1kJ/mol

Q: Calculate the heat exchanged when 32.0 g oxygen reacts with 16.0 g methane:  CH4(g) + 3/2 O2(g) →…

A: Ans -600kj

Q: . How much heat is absorbed when 60g of mercury (II) oxide reacts? 2HgO2Hg + O₂ AH = 181.4 kJ

A: Given :-  2HgO → 2Hg + O2       ∆H = 181.4 kJ  To calculate :-  Amount of heat absorbed by 60 g of…

Q: 2. Mercury (II) oxide is a reddish mineral that is used as the cathode in mercury batteries. It is…

A: In the above question the heat energy require to prepare 2 mole Hg have given . We have to calculate…

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

A: Given: Heat are absorbed by the reaction = 417 KJ ΔH = 43 KJ/mol Molar mass of NO = 30.01 g/mol

Q: Calculate the enthalpy of reaction, ΔHrxn, for 2SO2(g) + O2(g) → 2 SO3(g) Given, S(s) + O2(g) →…

A: Given, S(s) + O2(g) → SO2(g) ΔH= −299 kJS(s) +3/2O2(g) → SO3(g) ΔHsol= −395 kJ Calculate the…

Q: Determine the amount of heat (in kJ) given off when 1.26 X 10ʻ g of NO2 are produced according to…

A: The reaction given is 2 NO (g) + O2 (g) -------> 2 NO2 (g)                ΔH = -114.6 KJ/mol

Q: How many kilojoules of heat will be released when exactly 1 mole of manganese, Mn, is burned to form…

A: The chemical reaction for the burning of Manganese can be written as follows: 3Mn + 2O2 →Mn3O4  The…

Q: calculate the heat of the reaction 3 H2(g) + O3(g) 3 H2O(g)

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

A: Given Reaction: N2(g) + O2(g) ------>2NO (g)          ΔH = 43 KJ/mol

Q: Boron, atomic number 5, occurs naturally as two isotopes, 10B and 11B, with natural abundances of…

A: Isotopes are the atoms of the same element which has same atomic number but different mass number.…

Q: Which one of the following reactions would produce the largest amount of heat per mole of oxygen? A.…

A: CH4 (g) + 2O2 (g) →CO2 (g) + H2O (g)                      ∆H° = -802 kJ/mol 2Pb (s) + 3O2 (g) → 2…

Q: Enthalpy of combustion of the reaction CH, (g)+0,(g) → CO, (g)+H,0(g) is -890 kJ/mol. Calculate the…

A: Given-> CH4(g) + O2(g)--->CO2(g) + H2O(g) ∆H°c= -890 KJ/mol Weight of CH4 = 25.0 gm

Q: For each of the following reactions, draw the enthalpy diagram showing the relative energy state of…

A: The energy diagram is the representation of change in energy with the reaction progress. It will…

Q: Among the substances that react with oxygen and that have been considered as potential rocket fuels…

A: The balanced equations for all the rocket fuels are,…

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

A: Target equation:-  4P(s) + 5O2(g) -----> P4O10(s

Q: Calculate the standard enthalpy for the reaction: 4NH3(g) + 502(g) → 4NO(g) + 6H20(g), given the…

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Q: If 200 kJ of heat are supplied, how many grams of NO can be produced? N2(g) + O2(g)→ 2 NO(g) AH =…

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Q: A The equation for the formation of nitrogen monoxide is N2(g) + O2(g) + 90.2 kJ → 2NO (g) a Is the…

A: Exothermic reaction :-  A reaction in which heat is released is known as exothermic reaction For…

Q: Is this reaction exothermic, endothermic, or neither? If you said the reaction was exothermic or…

A: Mass of KOH = 10.8 g Moles of KOH = Mass / Molar mass = 10.8g / 56 g/mol = 0.193 mol Mass of…

Q: Consider the following reaction: 2Mg(s)+O2(g)⟶2MgO(s)                   ΔH∘=−1203 kJ What mass (in…

A: From stoichiometric equation, we will calculate the number of moles of magnesium that must be…

Q: What mass of O2 in grams can be produced when 250.0 kJ of heat was supplied? (MM O2 = 32.00 g/mol)…

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Q: 2. A 35 g metal ball made up of a mixture of element X and element Y is heated up to 77C and dropped…

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Q: C. Ex: Calculate the heat produced by reacting 12.6 g of hydrogen peroxide, H,02. 2 H2O2(aq) → 2…

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Q: The reaction N2(g) + 3H2(g) --> 2NH3(g) at 400.0°C has an associated heat of reaction -92.22 kJ/mol.…

A: The given chemical reaction is as follows: N2(g) + 3H2(g) → 2NH3(g)                    ∆Hr=-92.22…

Q: Given the following reactions: N2(g) + 202(g) –→ 2NO2(g) AH = 66.4 kJ 2NO(g) + O2(g)→ 2NO2(g) AH =…

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Q: 1. What is the enthalpy of reaction per mole of HCl (g) in the following reaction.( Don't have to…

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Q: The reaction between sodium metal and chlorine gas produces 822 kJ of heat energy for every chlorine…

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Q: heat

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Q: Given the standard enthalpy changes for the following two reactions: (1) N2(g) + O2(g) →2NO(g) AH° =…

A: According to Hess's law, when a reaction occurs in more than one step than the enthalpy change of…

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.