14th Edition

ISBN: 9780137453535

Author: Brown

Publisher: SAVVAS L

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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 …

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 energ…

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Textbook Question

Chapter 5, Problem 113AE

Ammonia (NH₃) boils at -33 °C; at this temperature it has a density of 0.81 g/cm³. The enthalpy of formation of NH₃(g) is - 46.2 kJ/mol, and the enthalpy of vaporization of NH₃(l) is 23.2kJ/mol. Calculate the enthalpy change when 1 L of liquid NH₃ is burned in air to give N₂(g) and H₂0(g). How does this compare withΔHfor the complete combustion of 1 L of liquid methanol, CH₃OH(l)?
For CH₃0H(l), the density at 25 °C is 0.792 g/cm³, andΔH°_f = - 229kJ /mol.

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Chapter 5, Problem 112AE

Chapter 5, Problem 114AE

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Chapter 5 Solutions

EP CHEMISTRY:CENTRAL SCI.-MOD.MASTERING

Ch. 5.2 - A mixture of gases A2 and B2 are introduced to a...Ch. 5.2 - Practice Exercise 2 Calculate the change in the...Ch. 5.3 - A solid sample of Zn(OH)2 is added to 0.350 L of...Ch. 5.3 - Practice Exercise 2 Calculate the work, in J, if...Ch. 5.3 - Practice Exercise 1 A chemical reaction that gives...Ch. 5.3 - Prob. 5.3.2PE Ch. 5.4 - Prob. 5.4.1PE Ch. 5.4 - Prob. 5.4.2PE Ch. 5.5 - The coinage metals (Group 1B) copper, silver, and...Ch. 5.5 - Prob. 5.5.2PE

Ch. 5.5 - Practice Exercise 1 When 0.243 g of Mg metal is...Ch. 5.5 - Practical exercise 2 When 50.0 mL of 0.100MAgNO3...Ch. 5.5 - Prob. 5.7.1PE Ch. 5.5 - Practice Exercise 2 A 0.5865-g sample of lactic...Ch. 5.6 - Prob. 5.8.1PE Ch. 5.6 - Prob. 5.8.2PE Ch. 5.6 - Calculate H for the reaction C(s)+...Ch. 5.6 - Prob. 5.9.2PE Ch. 5.7 - Prob. 5.10.1PE Ch. 5.7 - Prob. 5.10.2PE Ch. 5.7 - Prob. 5.11.1PE Ch. 5.7 - Prob. 5.11.2PE Ch. 5.7 - Practice Exercise 1 Given 2SO2(g) + 02(g) —>...Ch. 5.7 - Prob. 5.12.2PE Ch. 5.8 - Use the average bond enthalpies in Table 5.41to...Ch. 5.8 - Use the average bond enthalpies in Table 5.4 to...Ch. 5.9 - Prob. 5.14.1PE Ch. 5.9 - Prob. 5.14.2PE Ch. 5 - One of the important ideas of thermodynamics is...Ch. 5 - Two positively charged spheres, each with a charge...Ch. 5 - SI The accompanying photo shows a pipevine...Ch. 5 - Consider the accompanying energy diagram. 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When a 4 25-g sample of solid ammonium...Ch. 5 - A 2.200-g sample of quinone (C5H402) is burned in...Ch. 5 - 8.68 A 1.800-g sample of phenol (C6H5OH) was...Ch. 5 - Under constant-volume conditions, the heat of...Ch. 5 - 5.60 Under constant-volume conditions, the heat...Ch. 5 - 5.61 Can you use an approach similar to Hess's...Ch. 5 - 5.62 Consider the following hypothetical...Ch. 5 - Calculate the enthalpy change for the reaction...Ch. 5 - From the enthalpies of reaction calculate H for...Ch. 5 - From the enthalpies of reaction Calculate H for...Ch. 5 - Given the data use Hess's law to calculate H for...Ch. 5 - 5.67 What is meant by the term standard...Ch. 5 - S 5.68 What is the value of the standard enthalpy...Ch. 5 - For each of the following compounds, write a...Ch. 5 - Write balanced equations that describe the...Ch. 5 - The following is known as the thermite reaction:...Ch. 5 - 5.72 Many portable gas heaters and grills use...Ch. 5 - Using values from Appendix C , calculate the...Ch. 5 - 5.74 Using values from Appendix C, calculate the...Ch. 5 - Complete combustion of 1 mol of acetone (C2H6O)...Ch. 5 - Calcium carbide (CaC2) reacts with water to form...Ch. 5 - 5.77 Gasoline is composed primarily of...Ch. 5 - Prob. 78E Ch. 5 - Ethanol (C2H5OH) is blended with gasoline as an...Ch. 5 - 5.80 Methanol (CH3OH) is used as a fuel in race...Ch. 5 - 5.81 Without doing any calculations, predict the...Ch. 5 - 5.82 Without doing any calculations, predict...Ch. 5 - Use bond enthalpies in Table 5.4 Q to estimate for...Ch. 5 - Use bond enthalpies in Table 5.40 to estimate for...Ch. 5 - Use enthalpies of formation given in Appendix C to...Ch. 5 - 5.86 The nitrogen atoms in an N2 molecule are...Ch. 5 - 5.87 Consider the reaction 2H(g) + O2(g) ...Ch. 5 - 5.88 Consider the reaction H2(g) + I2(s) ...Ch. 5 - 5.89 What is meant by the term fuel value? 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