CHMA11H3 Study Guide - Final Guide: Pearson Education, Perpetual Motion, Spontaneous Process
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TRUE OR FALSE *freezing water is possible only if the entropy of the surroundings increases |
· Liquid water has a lower entropy than liquid benzene at 25°C because of hydrogen bonding in water. |
· Ice at 0°C has a higher entropy than liquid water at 0°C because the density of ice is lower than the density of water. |
· It is impossible to freeze ethanol because the change in entropy of the system is negative. |
· Binding a substrate to an enzyme always lowers the entropy because the substrate loses translational and rotational degrees of freedom. |
· Entropy is the main driving force in the formation of the DNA double helix. |
· Evaporating a liquid has always a positive change in entropy |
· All elements in their standard states have an entropy of zero at 25°C. |
· Reactions that involve only gases always have a positive change in entropy · The chemical potential of a solute in a mixture does not depend on the concentration of the solute because it is the molar Gibbs free energy of the substance. · For a reaction A ->2B, the âG of the reaction is negative as long as μA > μB · The activity of a 1M solution of a solute is a = 1 only if we assume that the solution is ideal. · The âG° of a reaction is zero when the reaction is at equilibrium. · âG° and âG°â are the same for a reaction does not involve hydrogen ions |