Homework Answers
Answer -
The entropy of a reaction is Positive if there are more number of gases molecules on product side and it is Negative if there are more number of Gas molecules on reactant side.
2 Mg (s) + O2
(g)
2 MgO (s)
Number of moles of gas on reactant side = 1
Number of moles of gas on product side = 0
So, 
S for this reaction is Negative. and the reason is there are more
number of moles of gas on reactant side than the product
side
OPTION D is the correct answer
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1.a) What is the sign of the entropy change for the following reaction? Note: You do...
1.a) What is the sign of the entropy change for the following
reaction? Note: You do not need the standard entropy values
2Zn (s) + O2 (g) ---> 2ZnO (s)
answer
a) 0 (Zero)
b) <0 (Negative)
c) No change
d)> 0 (Positive)
2.c)
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(Show your work and prove or disprove each multiple choice answer. Circle the best answers. )...
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1.a) What is the sign of the entropy change for the following
reaction? Note: You do not need the standard entropy values
2Zn (s) + O2 (g) ---> 2ZnO (s)
answer
a) 0 (Zero)
b) <0 (Negative)
c) No change
d)> 0 (Positive)
2.c)
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