Predict the sign of the entropy change - chemistry hurry!!?

R

roman pierce

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PART Predict the sign of the entropy change ΔS.

Pb2+(aq) + 2Cl-(aq) ---> PbCl2 (s)
CaCO3(s) ---> CaO(s) + CO2(g)
2NH3(g) ---> N2(g) +3H2(g)
P4(g) + 5O2(g) ---> P4H10 (s)
C4H8(g) +6O2(g) ---> 4CO2(g) + H2O(g)
I2(s) ---> I2(g)

PART 2
Calculate the standard entropy change for the reaction ΔS (J/mol)

P4(g) + 5O2(g) ---> P4H10(s)

(use the following data)

ΔHf(kJ/mol) ΔGf(kJ/mol) S(J/K.mol)
P4 (g)} 58.9 24.5 279.9
O2(g) 0 0 205.0
P4O10 (s) -2984 -2698 228.9
 
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