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Edit View History arks Window Help sapling learning.com 10 PM Question 3 of 32 Sapling Learning Classify each process as spontaneous or nonspontaneous. Spontaneous Nonspontaneous The dissolution of table salt in hot water. A mixture of N2 and O2 gas is separated into pure N2 and pure o2 Water freezes at 25 C and 1 atm. The conversion of diamond to Water at 20 C gets warmer when a piece of metal heated to 100 C is added. graphite at 25 C and 1 atm, o Previous Next pling Learning, Inc. about us careers privacy policy terms of u

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Table salt (NaCl) and water both are highly ordered material. When NaCl dissolves in hot water O-H bonds are broken and this process requires heat energy. hence the solution of table salt in hot water becomes less ordered and entropy increases. So this system is a spontaneous process.

25oC is the room temperature. Water does not freeze spontaneously at room temperature and 1 atm pressure because the magnitude of entropy depends on the temperature. so its a non-spontaneous process.

Water at 20 C gets warmer when a piece of metal heated to 100 C is added. when two objects at different temperatures come into contact, heat spontaneously flows from higher temperature object to the coolder object. Therefore the distribution of energy is uniform in this spontaneous process.

Diamond has more ordered forms than graphite. Thus graphite has greater standard entropy (So) than diamond. The standard entropy is the absolute entropy of a substance at 1 atm and 25 C temperature. Thus the conversion of diamond to graphite process is spontaneous process.

A mixture of N2 and O2 gas is separated into pure N2 and pure O2 is a non spontaneous process

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