Explanation Given: The compounds are: NO 2 (g) MgCO 3 (s) C 2 H 4 (g) CH 3 OH(1) When one mole of compound is formed from its elements during this process the change in enthalpy is called as the change in enthalpy of formation and both its elements and compound are in their standard state. The Δ H F 0 of the elements in their standard state is 0. Formula used: Δ H rxn 0 =∑n products ΔH H products 0 -∑n reactants Δ H reactants 0 where, n products and n reactants are the stoichiometric coefficients of products and reactants respectively.Δ H products 0 and ΔH H reactants 0 are the standard enthalpy of the products and reactants respectively. Calculation: a)1-Write the reactantsand products in their standard states. 2-Balance the reaction. N 2 (g)+2O 2 (g)→2NO 2 (g) 3- Look for the Δ H F 0 from the respective table. Δ H F , N 2 0 = 0 kJ/mol Δ H F , O 2 0 = 0 kJ/mol Δ H F , N O 2 0 = 33.18 kJ/mol 4-Calculate the Δ H rxn 0 Δ H rxn 0 = 2 × 33.18 kJ/mol-(1×0 kJ/mol+2×0 kJ/mol) = 66.36 kJ. b) 1-Write the reactants and products in their standard states. 2-Balance the reaction. Mg (s)+C(s)+3/2 O 2 (g)→MgCO 3 (s) 3- Look for the Δ H F 0 from the respective table. Δ H F , M g 0 = 0 kJ/mol Δ H F , C 0 =0 kJ/mol Δ H F , M g C o 3 0 = -1095.8 kJ/mol Δ H F , O 2 0 = 0kJ/mol 4-Calculate the H rxn 0 H rxn 0 = 1 x - 1095 ...

Chemistry: Structure and Properties (2nd Edition)

2nd Edition

ISBN: 9780134293936

Author: Nivaldo J. Tro

Publisher: PEARSON

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Definition Definition Number that is expressed before molecules, ions, and atoms such that it balances out the number of components present on either section of the equation in a chemical reaction. Stoichiometric coefficients can be a fraction or a whole number and are useful in determining the mole ratio among the reactants and products. In any equalized chemical equation, the number of components on either side of the equation will be the same.

Chapter 9, Problem 82E

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To determine:

The reaction for the formation of the given compounds from its elements in their standard states and the Δ $H_{rxn}^{0}$

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Chapter 9, Problem 81E

Chapter 9, Problem 83E

Chapter 9 Solutions

Chemistry: Structure and Properties (2nd Edition)

Ch. 9 - What is thermochemistry? Why is it important?Ch. 9 - What is energy? What is work? List some examples...Ch. 9 - Prob. 3E Ch. 9 - What is the law of conservation of energy? How...Ch. 9 - A friend claims to have constructed a machine that...Ch. 9 - What is a state function? List some examples of...Ch. 9 - What is internal energy? Is internal energy a...Ch. 9 - If energy flows out of a chemical system and into...Ch. 9 - If the internal energy of the products of a...Ch. 9 - What is heat? Explain the difference between heat...

Ch. 9 - How is the change in internal energy of a system...Ch. 9 - Explain how the sum of heat and work can be a...Ch. 9 - What is heat capacity? Explain the difference...Ch. 9 - Explain how the high specific heat capacity of...Ch. 9 - If two objects, A and B, of different temperature...Ch. 9 - What is pressure-volume work? How is it...Ch. 9 - What is calorimetry? Explain the difference...Ch. 9 - What is the change in enthalpy ( H) for a...Ch. 9 - Explain the difference between an exothermic and...Ch. 9 - From a molecular viewpoint where does the energy...Ch. 9 - From a molecular viewpoint, where does the energy...Ch. 9 - Is the change in enthalpy for a reaction an...Ch. 9 - Explain how the value of H for a reaction changes...Ch. 9 - What is Hess's law? Why is it useful?Ch. 9 - What is a standard state? What is the standard...Ch. 9 - How can bond energies be used to estimate H for a...Ch. 9 - Explain the difference between exothermic and...Ch. 9 - What is the standard enthalpy of formation for a...Ch. 9 - How do you calculate Hrxn from tabulated standard...Ch. 9 - What is lattice energy? 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Use average bond...Ch. 9 - Hydrogen, a potential future fuel, can be produced...Ch. 9 - Hydroxyl radicals react with and eliminate many...Ch. 9 - Write an equation for the formation of each...Ch. 9 - Prob. 82E Ch. 9 - S3. Hydrazine (N2H4) is a fuel used by some...Ch. 9 - Prob. 84E Ch. 9 - Prob. 85E Ch. 9 - Prob. 86E Ch. 9 - Prob. 87E Ch. 9 - Prob. 88E Ch. 9 - Top fuel dragsters and funny cars burn...Ch. 9 - Prob. 90E Ch. 9 - Prob. 91E Ch. 9 - Rubidium iodide has a lattice energy of-617...Ch. 9 - Prob. 93E Ch. 9 - Prob. 94E Ch. 9 - Use the Born-Haber cycle and data from Appendix...Ch. 9 - Prob. 96E Ch. 9 - The kinetic energy of a rolling billiard ball is...Ch. 9 - A100-W light bulb is placed in a cylinder equipped...Ch. 9 - Evaporating sweat cools the body because...Ch. 9 - LP gas burns according to the exothermic reaction:...Ch. 9 - Use standard enthalpies of formation to calculate...Ch. 9 - Dry ice is solid carbon dioxide. Instead of...Ch. 9 - A 25.5-g aluminum block is warmed to 65.4 °C and...Ch. 9 - We mix 50.0 mL of ethanol (density = 0.789 g/mL)...Ch. 9 - Prob. 105E Ch. 9 - Prob. 106E Ch. 9 - One tablespoon of peanut butter has a mass of 16...Ch. 9 - Prob. 108E Ch. 9 - Prob. 109E Ch. 9 - When we burn 10.00 g of phosphorus in O2 (g) to...Ch. 9 - The H for the oxidation of S in the gas phase to...Ch. 9 - The Hfo of TiI3(s) is -328 kJ/mol; and the Ho for...Ch. 9 - A copper cube measuring 1.55 cm on edge and an...Ch. 9 - A pure gold ring and pure silver ring have a total...Ch. 9 - The reaction of Fe2O3(s) with Al(s) to form...Ch. 9 - Prob. 116E Ch. 9 - Prob. 117E Ch. 9 - Prob. 118E Ch. 9 - Prob. 119E Ch. 9 - Calculate the heat of atomization (see previous...Ch. 9 - Prob. 121E Ch. 9 - Prob. 122E Ch. 9 - Prob. 123E Ch. 9 - Prob. 124E Ch. 9 - Prob. 125E Ch. 9 - Find H, E, q, and w for the freezing of water at...Ch. 9 - The heat of vaporization of water at 373 K is 40.7...Ch. 9 - Prob. 128E Ch. 9 - Prob. 129E Ch. 9 - Prob. 130E Ch. 9 - Prob. 131E Ch. 9 - Prob. 132E Ch. 9 - Prob. 133E Ch. 9 - Which expression describes the heat emitted in a...Ch. 9 - Prob. 135E Ch. 9 - Prob. 136E Ch. 9 - Prob. 137E Ch. 9 - Prob. 138E Ch. 9 - Prob. 139E Ch. 9 - Which statement is true of a reaction in which V...Ch. 9 - Which statement is true of an endothermic...Ch. 9 - When a firecracker explodes, energy is obviously...Ch. 9 - Prob. 143E Ch. 9 - Classify each process as endothermic or...Ch. 9 - A propane tank on a home barbeque contains 10.4 x...Ch. 9 - Prob. 146E Ch. 9 - Consider the decomposition of liquid hydrogen...Ch. 9 - Prob. 148E Ch. 9 - A chemical system produces 155 kJ of heat and does...Ch. 9 - Which sample is most likely to undergo the...Ch. 9 - Prob. 3SAQ Ch. 9 - A 12.5-g sample of granite initially at 82.0 C is...Ch. 9 - A cylinder with a moving piston expands from an...Ch. 9 - When a 3.80-g sample of liquid octane (C8H18)...Ch. 9 - Hydrogen gas reacts with oxygen to form water....Ch. 9 - Manganese reacts with hydrochloric acid to produce...Ch. 9 - Consider the reactions: A2BH1A3CH2 What is H for...Ch. 9 - Use standard enthalpies of formation to determine...Ch. 9 - Prob. 11SAQ Ch. 9 - Prob. 12SAQ Ch. 9 - Prob. 13SAQ Ch. 9 - Which set of compounds is arranged in order of...Ch. 9 - Prob. 15SAQ

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The reaction for the formation of the given compounds from its elements in their standard states and the Δ H rxn 0

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To determine:

The reaction for the formation of the given compounds from its elements in their standard states and the Δ $H_{rxn}^{0}$

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Chapter 9 Solutions

The reaction for the formation of the given compounds from its elements in their standard states and the Δ H rxn 0

Solution Summary: The author explains the reaction for the formation of the given compounds from its elements in their standard states and the H rxn 0.

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To determine: The reaction for the formation of the given compounds from its elements in their standard states and the Δ Hrxn0

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Chapter 9 Solutions

To determine:

The reaction for the formation of the given compounds from its elements in their standard states and the Δ $H_{rxn}^{0}$