Determine the sign of &Sp; and As for each chemical reaction shown below Also, f

Question

Determine the sign of &Sp; and As for each chemical reaction shown below Also, forecast for which temperatures (all temperatures, low temperabures, or high temperatures) the reactions will be spontaneous sign of &s; O positive 0 ative sign of AS O positive spontanaity spontaneous at all emperatures spontaneous only at low tener atures spontanesus only at high temperatures ign of &S; O positive nagative positive negative spontaneity pontaneus at all temperatures spontaneous only at low temperatures spontanesus only at high temperatures

Explanation / Answer

Q1

a)

dS system must be positive, since there is plenty of gas formation

dSsurroundings --> will increase, since the reaction is releasing heat, which implies chaos generation in suroundings

spontnaous -< yes since both system + surrounding sincrease in entropy; true always

b)

dSxyxstem is positive, since more gas is produced

dSsurr --> negative, since it loses heat

this is only possible at High Temperature; otherwise the dSuniverse will not yield positive

c)

dSsystem = positive, since ore moles of gas are porduced

dSsurroundings --> positive, since exothermic, incrases chaos in surrounginds

this is lawyas spontaneous

d)

dssystem = increases, due to moles of gas formation

dssurr --> positive, since dHr is exothermic

this is always spontanoeus

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