1. The hydrogenation of ethene gas at 298. K shows a decrease in disorder (AS = -120.7 J/(mol·K)) during an exothermic reaction (AH = -136.9 kJ/mol). Determine whether the reaction is spontaneous or nonspontaneous by calculating AG*.
C2H4 (g) + H2(g) → C2H6 (g)

Aflashlight produces light using energy from the batteries. in which order does the energy change form? a. from chemical to electric to light energy b. from electric to light to chemical energy c. from electric to chemical to light energy d. from light to electric to chemical energy

Consider the model of the oxygen cycle on earth. the majority of earth's oxygen reservoirs are found in the a) atmosphere. b) biosphere. c) hydrosphere. d) lithosphere.

Which entry is in the wrong position in the table?