Ch.14 - Chemical EquilibriumWorksheetSee 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: A 1.00 L reaction vessel contains 1.2 mol CO(g), 1.5 mol H 2(g), and 2.0 mol CH3OH(g). How will Ptotal change as the system approaches equilibrium at constant T?CO(g) + 2H2(g) ⇌ CH3OH(g)          K c

Solution: A 1.00 L reaction vessel contains 1.2 mol CO(g), 1.5 mol H 2(g), and 2.0 mol CH3OH(g). How will Ptotal change as the system approaches equilibrium at constant T?CO(g) + 2H2(g) ⇌ CH3OH(g)          K c

Problem

A 1.00 L reaction vessel contains 1.2 mol CO(g), 1.5 mol H 2(g), and 2.0 mol CH3OH(g). How will Ptotal change as the system approaches equilibrium at constant T?

CO(g) + 2H2(g) ⇌ CH3OH(g)          K c = 14.5

Solution

We´re asked to determine the change of Ptotal as the given system approaches equilibrium at constant T.


The equilibrium reaction is:

CO(g) + 2H2(g)  CH3OH(g)          Kc = 14.5


We know that the initial amount of CO is 1.2 mol, of H2 is1.5 mol, and of CH3OH is 2.0 mol.

In a 1.00 L container, the concentration of each is:

Molarity (M)=moles of soluteLites of solutionCO=1.2 mol of CO1.00 L=1.2 M COH2=1.5 mol of H21.00 L=1.5 M H2CH3OH=2.0 mol of CH3OH1.00 L=2.0 M CH3OH



Since we have the initial concentrations of products and reactants, we calculate the reaction quotient (Q) to determine if the reaction is at equilibrium or not.


The formula for Q is:

Q=productsreactants



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