The Gibbs free energy equation models how free energy ΔG ________.( )
A. increases as both Keq and T increase
B. increases most when Keq increases and T decreases
C. increases most when Keq decreases and T increases
D. increases as both Keq and T decrease
E. increases as reactant concentrations increase
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An increase in which of the following results in a decrease in the rate of the chemical reaction? ( )
A. temperature
B. concentration
C. collision frequency
D. energy of activation
E. fraction of collisions with proper orientation
An increase in which of the following will occur if the reaction temperature is increased? ( ) I. Energy of activation II. Collision frequencyIII. Fraction of collisions with sufficient energy
A. I and II
B. I and III
C. II and III
D. I, II, and III
E. I
Which of the following statements about ethene, C2H4, is incorrect? ()
A. The H-C-H bond angles are approximately 109.5°.
B. All of the hydrogen atoms are in the same plane.
C. There is a total of five sigma bonds.
D. The carbon atoms are sp2 hybridized.
E. The H-C-H bond angles are approximately 120°.
An increase in which of the following will occur if the reaction temperature is ()? I. Energy of activation II. Collision frequency III. Fraction of collisions with sufficient energy
A. I and II
B. I and III
C. II and III
D. I, II, and III
E. I
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