Ch. 17 - Chemical ThermodynamicsWorksheetSee all chapters
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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: Given the values of ΔH∘rxn, ΔS∘rxn, and T below, determine ΔSuniv. a) ΔH∘rxn = 87 kJ , ΔS∘rxn = 146 J/K , T= 296 K, will this be spontaneous or not spontaneous? b) ΔH∘rxn = 87 kJ , ΔS∘rxn = 146 J/K , T= 762 K, will this be spontaeous or not spontaneous? c) ΔH∘rxn = 87 kJ , ΔS∘rxn = −46 J/K , T= 296 K, will this be spontaneous or not spontaneous? d) ΔH∘rxn = −87 kJ , ΔS∘rxn = 146 J/K , T= 390 K, will this be spontaneous or not spontaneous?

Problem

Given the values of ΔHrxn, ΔSrxn, and T below, determine ΔSuniv.

a) ΔHrxn = 87 kJ , ΔSrxn = 146 J/K , T= 296 K, will this be spontaneous or not spontaneous?

b) ΔHrxn = 87 kJ , ΔSrxn = 146 J/K , T= 762 K, will this be spontaeous or not spontaneous?

c) ΔHrxn = 87 kJ , ΔSrxn = −46 J/K , T= 296 K, will this be spontaneous or not spontaneous?

d) ΔHrxn = −87 kJ , ΔSrxn = 146 J/K , T= 390 K, will this be spontaneous or not spontaneous?