How Does The Entropy Of A System Change For Each Of The Following Processes

For which of the following processes does the entropy of the system increase?

For which of the following processes does the entropy of the system increase?
(a) spreading of the fragrance of perfume through a room;
(b) separating a mixture of N2 and O2 into two separate samples, one that is pure N2 and one that is pure O2;
(c) the bursting of an inflated balloon;
(d) the reaction of sodium metal with chlorine gas to form sodium chloride;
(e) the dissolution of HCL(g) in water to form concentrated hydrochloric acid.

For which of the following processes does the entropy of the system increase?

(Select all that apply.)

~the reaction of nitrogen atoms to form N2 molecules at 25°C and 1 atm

~alignment of iron filings in a magnetic field

~dissolution of sugar in a cup of hot coffee

~the melting of ice cubes at -5°C and 1 atm

~formation of CH4 and O2 molecules from CO2 and H2O molecules at room temperature and 1 atm

How does the entropy of a system change for each of the following processes?

a decreases
b decreases
c increases
d increases

Need help with chemistry, easy points. How does the entropy of a system change for a process?

a) Decrease in Entropy. As water vapor condenses the molecules become less random and are eaiser to locate. In general gas has higher entropy than liquid, and liquid has higher entropy than solid.

b) Increase in entropy. Again, as the alcohol is heated the molecules move more and the system is more random

c) Increase in entropy. As the highly uniform ice crystals melt to liquid it becomes more random.

d) Entropy decreses. As the alcohol freezes the entropy decreases, beucase the molecules arrange themselves in an orderly pattern causing randomness to decress.

So basically Entropy Decrease = Less Random
Entropy Increase = More random.

(b) For which of the following processes does the entropy of the system increase? (Select all that apply.)?

Melting of ice cubes: positional entropy (freedom of movement) increases.

Formation of CH4(g) and O2(g) from CO2(g) and H2O(l):
CO2(g) + 2H2O(l) -----> CH4(g) + 2O2(g)
There is an increase in the number of gaseous molecules (whose translational entropies dominate the entropy term) - the entropy increases.

Dimerization of nitrogen atoms to nitrogen molecules - loss of translational entropy (#of gas particles is cut in half) - decrease in total entropy.

Alignment of iron filings in a magnetic field - any "alignment" decreases the positional entropy by ordering the system.

Dissolution of sugar in a cup of hot coffee - increase in positional entropy (the sugar molecules have more positions available in solution than in a rigid crystal.)

Predict the sign of entropy change for each of the following processes. Justify your answer?

a. Solid sugar is added to water to form a solution.
Positive entropy change. Energy contain before and after the process is the same, hence for the process able to occure there must be increase of entropy.

b. Iodine vapor condenses on a cold surface to form crystals.
Solid has lower entropy than vapor, thus this process has negative entropy change.

How does the entropy of a system change (increase or decrease) for each of the following processes?

a. entropy decreases- you're forming a solid from a liquid. solids have less entropy than liquids, liquids less entropy than gases, etc.

b. you're increasing entropy. Generally, adding heat to a substance increases the kinetic energy of the molecules, meaning they bump into each other faster, meaning more disorder = more entropy.

c. going from liquid to a solid again- decreasing entropy.

d. ice is going from solid to gas, so increasing entropy.