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chem1008assignment12(April28)

chem1008assignment12(April28) - ∆ S>0 or ∆ S<0(b...

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CHEMISTRY 1008 Name: ___________________ Homework Assignment #12 Due: Thursday, April 28 1. (7 pts) 42.7 mL of 0.00320 M Zn(NO 3 ) 2 solution was combined with 81.4 mL of 0.229M NH 3 . What is the concentration of Zn 2+ (aq) after the solution reaches equilibrium? You can assume that the total volume of the resulting mixture is 124.1 mL. The K f for Zn(NH 3 ) 4 2+ is 2.8x10 9 . 2. (2 pts) Predict whether the entropy change is greater or less than zero for each of the following processes. Circle S>0 if the process increases entropy and circle S<0 if the process decreases entropy. (a) freezing ethanol
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Unformatted text preview: ∆ S>0 or ∆ S<0 (b) evaporating bromine ∆ S>0 or ∆ S<0 (c) dissolving urea in water ∆ S>0 or ∆ S<0 (d) cooling nitrogen gas ∆ S>0 or ∆ S<0 3. (1 pt) Predict whether the entropy change of the system in each of the following reactions is greater or less than zero for each of the following processes. Circle ∆ S>0 if the process increases entropy and circle ∆ S<0 if the process decreases entropy. (a) 2H 2 (g) + O 2 (g) . 2H 2 O( l ) ∆ S>0 or ∆ S<0 (b) NH 4 Cl(s) . NH 3 (g) + HCl(g) ∆ S>0 or ∆ S<0...
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