Define entropy. Predict whether entropy change in the following process would be positive or negative.

${\mathrm{N}}_2{\mathrm{O}}_3\left(\mathrm{g}\right)\to {\mathrm{N}}_2\mathrm{O}\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right).$

Define entropy. Predict whether entropy change in the following process would be positive or negative.

Freezing of water.

How would you account for the fact that entropy of ice is less than that of water?

State whether the entropy of the system increases, decreases or remains unchanged in the following process: One gram of water evaporates into steam at the same pressure and temperature.

State whether the entropy of the system increases, decreases or remains unchanged in the following process: One gram of water freezes into ice at the same pressure and temperature.