Entropy

Of phases, from greatest to least entropy is gas>liquid>solid. Dissolving a salt into solution is an increase in entropy because the salt has greater space to move. The only decrease in entropy is condensation of water on glass (gas to liquid)

Entropy for phases are Gas>Liquid>Solid. A salt dissolving into solution has a positive entropy change (the solution becomes more chaotic). Therefore all of the listed reactions are a positive change in entropy, making E the correct answer.

Equilibrium is the basis of entropy, which can essentially be thought of as the distribution of energy in the system. For a reaction at a given temperature, the system's entropy will be at a maximum when it reaches equilbrium because this is the ideal energy state, and the forward and reverse reactions are occurring at a steady rate.

Entropy can be thought of as the tendency for a system to become disordered, or random. Osmosis, melting ice, and a clean room becoming dirty are all examples of entropy at work. Each of these processes will occur spontaneously without the input of outside energy or work.

If you make a skyscraper, you are incorporating a series of compounds and building products into a single, distinct formation. Think of it this way: what are the odds that mother nature would spontaneously build a building? This process is very ordered, which means that entropy of the universe has decreased.

The change in entropy is calculated by:

When cannot be measured, it can be calculated from known entropies of formation.

It is important to first balance the reaction before performing calculations. The coefficients are important in determining the change in entropy of a reaction.

The change in entropy is calculated by:

When cannot be measured, it can be calculated from known entropies of formation.

It is important to first balance the reaction before performing calculations. The coefficients are important in determining the change in entropy of a reaction.

The change in entropy is calculated by:

When cannot be measured, it can be calculated from known entropies of formation.

It is important to first balance the reaction before performing calculations. The coefficients are important in determining the change in entropy of a reaction.

The change in entropy is calculated by:

When cannot be measured, it can be calculated from known entropies of formation.

It is important to first balance the reaction before performing calculations. The coefficients are important in determining the change in entropy of a reaction.

The change in entropy is calculated by:

When cannot be measured, it can be calculated from known entropies of formation.

It is important to first balance the reaction before performing calculations. The coefficients are important in determining the change in entropy of a reaction.

The change in entropy is calculated by:

When cannot be measured, it can be calculated from known entropies of formation.

It is important to first balance the reaction before performing calculations. The coefficients are important in determining the change in entropy of a reaction.