Identify the true statement(s) regarding the entropy of chemical substances. Two

Question

Identify the true statement(s) regarding the entropy of chemical substances. Two moles of a substance at temperature T and pressure p has twice the entropy of one mole of the same substance at the same temperature and pressure. Precipitation reactions are typically associated with a decrease in entropy S°(one mole N204(8)>S (one mole NO2(8)) at 25°C The entropy change for the reaction N204(8)-2 NO28) is positive Entropy increases when a 1 L cylinder of gas is opened within a 5 L evacuated cylinder.

Explanation / Answer

a)

False, according to the new "microstates"

n = 1 --> 1 microstate

n = 2 --> 2 microstates

b)

not really, since microsttes decreases so the entropy of ions is less

c)

True, since N2O4 has higher mass/microstates

entropy will be higher for the complex species

d)

true, since 1 mol fog as produces 2 mol fo gas

e)

true, since volume increases implies moer microstates

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