11th Edition

ISBN: 9780133897340

Author: Petrucci

Publisher: PEARSON CO

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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 7, Problem 105IAE

A calorimeter that measures an exothermic heat of reaction by the quantity of ice that can be melted is called an ice calorimeter. Now consider that 0.100 L of methane gas, CH₂(g), at 25.0°C and 744 mmHg, is burned at constant pressure in air. The heat liberated is captured and used to melt 9.53 g ice at 0°C ( Δ r a H of ice = 6.01 k J / m o I ).
a. Write an equation for the complete combustion of CH₄, and show that combustion is incomplete in this case.
b. Assume that CO(g) is produced in the incomplete combustion of CH₄ and represent the combustion as best you can through a single equation with small whole numbers as coefficients. (H₂O(I) is another product of the combustion.)

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Chapter 7, Problem 104IAE

Chapter 7, Problem 106IAE

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Chapter 7 Solutions

EP GENERAL CHEMISTRY-MOD.MASTERINGCHEM.

Ch. 7 - Calculate the quantity of heat, in kilojoules, (a)...Ch. 7 - Calculate the final temperature that results when...Ch. 7 - Refer to Example 7-2. The experiment is repeated...Ch. 7 - A 75.0 g piece of Ag metal is heated to 80.0C and...Ch. 7 - A 465 g chunk of iron is removed from an oven and...Ch. 7 - A piece of stainless steel (C2=0.50Jg-1C-1) is...Ch. 7 - A 1.00 kg sample of magnesium at 40.0C is added to...Ch. 7 - Brass has a density of 8.40 g/cm2 and a specific...Ch. 7 - A 74.8 g sample of copper at 143.2C is added to an...Ch. 7 - A 69.0 g sample of gold at 127.1C is added to an...

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Solution Summary: The author explains that an equation for the complete combustion of methane should be written and that the combustion is incomplete. Standard enthalpy of combustion occurs when 1 mole of a substance is completely burnt in excess oxygen

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