Athermometer is in a beaker of water. which statement best explains why the thermometer reading initially increases when libr(s) is dissolved in the water?
(1) the entropy of the libr(aq) is greater than the entropy of the water.
(2) the entropy of the libr(aq) is less than the entropy of the water.
(3) the dissolving of the libr(s) in water is an endothermic process.
(4) the dissolving of the libr(s) in water is an exothermic process.

8

explanation:

each principal energy level above the first contains one s orbital and three p orbitals. a set of three p orbitals, called the p sublevel, can hold a maximum of six electrons. therefore, the second level can contain a maximum of eight electrons - that is, two in the s orbital and 6 in the three p orbitals.

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nacl is added to the aqueous of what? ? in order to get a proper answer you have to specify the exact composition of the aqueous solution.