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April 20, 2014

Homework Help: AP CHEMISTRY

Posted by HELP PLEASE on Monday, March 19, 2012 at 4:12pm.

A)In a chemical reaction two gases combine to form a solid. What do you expect for the sign of ΔS?

B) For which of the following processes does the entropy of the system increase? (Select all that apply.)

-> alignment of iron filings in a magnetic field

-> the melting of ice cubes at 10C and 1 atm pressure

-> the dissolution of HCl(g) in water to form concentrated hydrochloric acid

-> the reaction of hydrogen gas with oxygen gas to form water vapor

->separating a mixture of N2 and O2 into two separate samples, one that is pure N2 and one that is pure O2

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