Molecular systems tend to move spontaneously to a state of maximum randomness or disorder. molecular randomness, or disorder, is called entropy and is denoted by the symbol s. as a state function, entropy change, ? s, depends only on initial and final states. ? s has a positive value when disorder increases and a negative value when disorder decreases. the following conditions usually result in an increase in entropy:

a change of phase: solid? liquid? gas,

an increase in the number of gas molecules, or

a solid dissolving to form a solution.

although the sign of the entropy change can be predicted as described above, the actual value of ? s? must be calculated from the absolute entropy values, s? , of the reactants and products:

? s? =s? (products)? s? (reactants)

narendra modi is currently the pm of india

explanation:

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.