Answer:
Option A
Explanation:
Standard molar entropy determines the randomness of a mole of substance. Thus, the larger and complex a molecule is, the larger will be its molar entropy.
The molar entropy of gases is higher than liquids which is turn is higher than solid.
Here , NO2 is a gas with higher complex structure (trigonal planar) than N2 (linerar), N2O (linear) and N2O2 (linear)
Hence, NO2(g) will have greatest standard molar entropy
Option A is correct
The substance that would have the greatest standard molar entropy is : (A ) : NO₂ ( g )
Standard molar entropy is the measurement of the the randomness ( entropy ) of one mole of a substance. The complexity of a substance determines the value of its molar entropy.
From the options listed the most complex substance is NO₂ whose structure is a trigonal planar while other substances have linear structures. Therefore the substance with the greatest standard molar entropy is NO₂.
Hence we can conclude that The substance that would have the greatest standard molar entropy is : NO₂ ( g ).
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