Basic Chemistry Practice Test: Chemical Thermodynamics — Flashcards | Chemistry | FatSkills

Basic Chemistry Practice Test: Chemical Thermodynamics — Flashcards

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Chemical thermodynamics is the study of how heat and work relate to each other in chemical reactions and physical changes of state. It also involves a set of rules and laws that explain which processes can happen spontaneously and which need some help. 

The primary goal of chemical thermodynamics is to determine the feasibility of a given transformation. It is used to predict energy exchanges in the following processes:
Chemical reactions
Phase changes
Formation of solutions 

The state functions that are most important in chemical thermodynamics are:
Internal energy (U)
Enthalpy (H)
Entropy (S)
Gibbs free energy (G) 

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The combustion of ethene in the presence of excess oxygen yields carbon dioxide and water:
C2H4 (g) + 3O2 (g) . 2CO2 (g) + 2H2O (l) The value of ΔS° for this reaction is __________ J/K.
-267.4
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