Question

Rank these systems in order of decreasing entropy.

a. 1 mol of oxygen gas at 273 k and 40 L

b. 1 mol of carbon disulfide gas at 273 k and L

c. 1/2 mol of radon gas at 100 k and 20 L

d. 1/2 mol of radon gas at 273 k and 20 L

e. 1/2 mol of liquid radon at 100 k

f. 1 mol of radon gas at 273 k and 20 L

g. 1 mol of radon gas at 273 k and 40 L

Answer 1

Entropy is defined as the degree of randomness or disorderness of the system.

The molecules with higher molar mass in the same conditions as the others exhibit higher entropy.

So the ranking of these systems in order of decreasing entropy is :

g. 1 mol of radon gas at 273 k and 40 L

f. 1 mol of radon gas at 273 k and 20 L

b. 1 mol of carbon disulfide gas at 273 k and L

a. 1 mol of oxygen gas at 273 k and 40 L

d. 1/2 mol of radon gas at 273 k and 20 L

c. 1/2 mol of radon gas at 100 k and 20 L

e . 1/2 mol of liquid radon at 100 k