Understanding entropy changes

Question 1

in general, entropy increases in the order: (from different phases)

Answer 1

solid < liquid < gas

low high

Question 2

becuse of the general incerase in entropy associated from solids to lquids ot gases, we would expect a system in which a gas is produced from a solid to have a ………….entropy

Answer 2

increased

Question 3

if you increase the number of moles you have, this automatically inreases

Answer 3

the number of particles present

Question 4

increasing the number of moles you have will increase not only the number of particles but also

Answer 4

the number of ways the particles can be arranged and this increases the entropy of the system, making ΔSSsystem positive

Question 5

deduce whether ΔSsystem will be positive or negative for the following reaction:

2CH3COOH(l) + (NH4)2CO3(s) = 2CH3COONH4(s) + H2O(l) +CO2(g)

Answer 5

ΔSsystem is postitive because the number of moles of products is more than the number of moles of reactant, therefore the number of moles has increased (by 1 in this case) so the number of particles increases, so the number of ways the particles arrange themselves increases, so the entropy increases