Question

Predict whether the Delta Ssys will be positive or negative, and explain why. a. 2H2 (g)...

Predict whether the Delta Ssys will be positive or negative, and explain why.

a. 2H2 (g) + O2 (g) ----> 2H2O (g)

b. C2H2O2 (g) ------> 2CO (g) + H2 (g)

c. H2O (l) ----> H2) (s)

d. NH4HCO3 (s) ----> NH3 (g) + H2O (g) + CO2 (g)

e. PbI2 (s) -----> Pb2+ (aq) + 2I- (aq)

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Answer #1

a) DeltaSsys will be negative. This is because two gas molecule are combined hence the have been more ordered and randomness decreases

b) DeltaSsys will be positive. This is because one molecule is breaking into more molecule and randomness will increas

c) DeltaSsys will be positive. This is because solid water have more volume than liquid water (exceptional case)

d)DeltaSsys will be positive. This is because more number of molecule are being produced from single molecule

e)DeltaSsys will be positive. This is because one molecule is broken into three ions and randomness will be increased

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