Ch.6 - Thermochemistry WorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: Assuming the heat released from the combustion of CH 4 can be used with 100% efficiency, how much CH4 (in g) is required to be combusted in the presence of excess oxygen to warm 1.75 kg of water (Cw=

Problem

Assuming the heat released from the combustion of CH 4 can be used with 100% efficiency, how much CH4 (in g) is required to be combusted in the presence of excess oxygen to warm 1.75 kg of water (Cw= 4.184 J/gK) from 25.0 to 98.0 °C? The enthalpy of combustion of CH4 is -802.3 kJ/mol.

A. 56.5 g

B. 46.2 g

C. 28.7 g

D. 10.7 g

E. 7.04 g