For the reaction C2H6 (g) . C2H4 (g) + H2 (g) ΔH° is +137 kJ/mol and ΔS° is +120 J/ K · mol. This reaction is __________.

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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... Show more

For the reaction C<sub>2</sub>H<sub>6</sub> (g) . C<sub>2</sub>H<sub>4</sub> (g) + H<sub>2</sub> (g) ΔH° is +137 kJ/mol and ΔS° is +120 J/ K · mol. This reaction is __________.