Chemistry: The Molecular Nature of Matter and Change - Standalone book
Chemistry: The Molecular Nature of Matter and Change - Standalone book
7th Edition
ISBN: 9780073511177
Author: Martin Silberberg Dr., Patricia Amateis Professor
Publisher: McGraw-Hill Education
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Chapter 6, Problem 6.55P

(a)

Interpretation Introduction

Interpretation:

Whether the heat is absorbed or released in the following reaction is to be determined.

MgCO3(s)MgO(s)+CO2(g)

Concept introduction:

The internal energy of a process is the summation of the kinetic energy and potential energy associated with the process. In chemical reactions, the change in internal energy (ΔE) is the difference in the energy of the product and reactant but at constant pressure, the PΔV work gets eliminated and the change in enthalpy (ΔH) is measured.

In chemical reactions, the change in enthalpy (ΔH) is the difference in the energy of the product and reactant. The general expression to calculate ΔH is,

ΔH=HProductHReactant (1)

Here,

ΔH is the change in enthalpy of the system.

HProduct is the enthalpy of the products.

HReactant is the enthalpy of the reactants.

Endothermic reactions are the reactions in which energy in the form of the heat or light is absorbed by the reactant for the formation of the product. HProduct is greater than HReactant in the endothermic reactions.

Exothermic reactions are the reactions in which energy in the form of the heat or light is released with the product. HReactant is greater than HProduct in the exothermic reactions.

(b)

Interpretation Introduction

Interpretation:

ΔH for the reverse reaction is to be determined.

Concept introduction:

Endothermic reactions are the reactions in which energy in the form of the heat or light is absorbed by the reactant for the formation of the product. HProduct is greater than HReactant in the endothermic reactions.

Exothermic reactions are the reactions in which energy in the form of the heat or light is released with the product. HReactant is greater than HProduct in the exothermic reactions.

(c)

Interpretation Introduction

Interpretation:

ΔH when 5.35 mol of CO2 reacts with excess MgO is to be determined.

Concept introduction:

Endothermic reactions are the reactions in which energy in the form of the heat or light is absorbed by the reactant for the formation of the product. HProduct is greater than HReactant in the endothermic reactions.

Exothermic reactions are the reactions in which energy in the form of the heat or light is released with the product. HReactant is greater than HProduct in the exothermic reactions.

(d)

Interpretation Introduction

Interpretation:

ΔH when 35.5 g of CO2 reacts with excess MgO is to be determined.

Concept introduction:

Endothermic reactions are the reactions in which energy in the form of the heat or light is absorbed by the reactant for the formation of product. HProduct is greater than HReactant in the endothermic reactions.

Exothermic reactions are the reactions in which energy in the form of the heat or light is released with the product. HReactant is greater than HProduct in the exothermic reactions.

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Chapter 6 Solutions

Chemistry: The Molecular Nature of Matter and Change - Standalone book

Ch. 6.3 - When 25.0 mL of 2.00 M HNO3 and 50.0 mL of 1.00 M...Ch. 6.3 - Prob. 6.6BFPCh. 6.3 - Prob. 6.7AFPCh. 6.3 - Prob. 6.7BFPCh. 6.4 - Prob. 6.8AFPCh. 6.4 - Prob. 6.8BFPCh. 6.5 - Prob. 6.9AFPCh. 6.5 - Prob. 6.9BFPCh. 6.6 - Prob. 6.10AFPCh. 6.6 - Prob. 6.10BFPCh. 6.6 - Prob. 6.11AFPCh. 6.6 - Prob. 6.11BFPCh. 6.6 - Prob. B6.1PCh. 6.6 - Prob. B6.2PCh. 6 - Prob. 6.1PCh. 6 - Prob. 6.2PCh. 6 - Prob. 6.3PCh. 6 - Prob. 6.4PCh. 6 - Prob. 6.5PCh. 6 - Prob. 6.6PCh. 6 - Prob. 6.7PCh. 6 - Prob. 6.8PCh. 6 - A system releases 255 cal of heat to the...Ch. 6 - What is the change in internal energy (in J) of a...Ch. 6 - Prob. 6.11PCh. 6 - Prob. 6.12PCh. 6 - Thermal decomposition of 5.0 metric tons of...Ch. 6 - The nutritional calorie (Calorie) is equivalent to...Ch. 6 - If an athlete expends 1950 kJ/h, how long does it...Ch. 6 - Why is the work done when a system expands against...Ch. 6 - Prob. 6.17PCh. 6 - Hot packs used by skiers produce heat via the...Ch. 6 - Prob. 6.19PCh. 6 - Prob. 6.20PCh. 6 - For each process, state whether ΔH is less than...Ch. 6 - Prob. 6.22PCh. 6 - The external pressure on a gas sample is 2660...Ch. 6 - Prob. 6.24PCh. 6 - Prob. 6.25PCh. 6 - Prob. 6.26PCh. 6 - Prob. 6.27PCh. 6 - Prob. 6.28PCh. 6 - Prob. 6.29PCh. 6 - Prob. 6.30PCh. 6 - Prob. 6.31PCh. 6 - Prob. 6.32PCh. 6 - What data do you need to determine the specific...Ch. 6 - Is the specific heat capacity of a substance an...Ch. 6 - Prob. 6.35PCh. 6 - Both a coffee-cup calorimeter and a bomb...Ch. 6 - Find q when 22.0 g of water is heated from 25.0°C...Ch. 6 - Calculate q when 0.10 g of ice is cooled from...Ch. 6 - A 295-g aluminum engine part at an initial...Ch. 6 - Prob. 6.40PCh. 6 - Two iron bolts of equal mass—one at 100.°C, the...Ch. 6 - Prob. 6.42PCh. 6 - Prob. 6.43PCh. 6 - Prob. 6.44PCh. 6 - Prob. 6.45PCh. 6 - A 30.5-g sample of an alloy at 93.0°C is placed...Ch. 6 - High-purity benzoic acid (C6H5COOH; ΔH for...Ch. 6 - Two aircraft rivets, one iron and the other...Ch. 6 - A chemical engineer placed 1.520 g of a...Ch. 6 - When 25.0 mL of 0.500 M H2SO4 is added to 25.0 mL...Ch. 6 - Prob. 6.51PCh. 6 - Prob. 6.52PCh. 6 - Prob. 6.53PCh. 6 - Consider the following balanced thermochemical...Ch. 6 - Prob. 6.55PCh. 6 - Prob. 6.56PCh. 6 - When 1 mol of KBr(s) decomposes to its elements,...Ch. 6 - Prob. 6.58PCh. 6 - Compounds of boron and hydrogen are remarkable for...Ch. 6 - Prob. 6.60PCh. 6 - Prob. 6.61PCh. 6 - Prob. 6.62PCh. 6 - Prob. 6.63PCh. 6 - Prob. 6.64PCh. 6 - Prob. 6.65PCh. 6 - Prob. 6.66PCh. 6 - Prob. 6.67PCh. 6 - Prob. 6.68PCh. 6 - Write the balanced overall equation (equation 3)...Ch. 6 - Prob. 6.70PCh. 6 - Prob. 6.71PCh. 6 - Prob. 6.72PCh. 6 - Prob. 6.73PCh. 6 - Prob. 6.74PCh. 6 - Prob. 6.75PCh. 6 - Prob. 6.76PCh. 6 - Prob. 6.77PCh. 6 - Prob. 6.78PCh. 6 - Prob. 6.79PCh. 6 - Calculatefor each of the following: SiO2(s) +...Ch. 6 - Prob. 6.81PCh. 6 - Prob. 6.82PCh. 6 - The common lead-acid car battery produces a large...Ch. 6 - Prob. 6.84PCh. 6 - Prob. 6.85PCh. 6 - Prob. 6.86PCh. 6 - Prob. 6.87PCh. 6 - Prob. 6.88PCh. 6 - Prob. 6.89PCh. 6 - The following scenes represent a gaseous reaction...Ch. 6 - Prob. 6.91PCh. 6 - Prob. 6.92PCh. 6 - Prob. 6.93PCh. 6 - Prob. 6.94PCh. 6 - Prob. 6.95PCh. 6 - Prob. 6.96PCh. 6 - Prob. 6.97PCh. 6 - Prob. 6.98PCh. 6 - Prob. 6.99PCh. 6 - Prob. 6.100PCh. 6 - Prob. 6.101PCh. 6 - Prob. 6.102PCh. 6 - Prob. 6.103PCh. 6 - Liquid methanol (CH3OH) canbe used as an...Ch. 6 - Prob. 6.105P
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