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What are the signs of DeltaS for the sys...

What are the signs of `DeltaS` for the system and for the surrounding in each of the following processes?
(a) Water boils in a teakettle on a hot stove.
(b) Ice in an ice cube tray, left an a table melts.
(c) A cup of coffee is reheated in a microwave oven.

Text Solution

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The correct Answer is:
(a) `DeltaS_("sys")` is positive ; `DeltaS_("surr")` is negative; (b) `DeltaS_("sys")` is positive , `DeltaS_("surr")` is negative; (c) `DeltaS_("sys")` is positive, `DeltaS_("surr")` is negative.
`(a) DeltaS_(sys)` is positive , `DeltaS_("surr")` is negative,
(b)` DeltaS_(sys)` is positive , `DeltaS_("surr")` is negative,
(c)` DeltaS_(sys)` is positive , `DeltaS_("surr")` is negative.
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