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For a spontaneous process, which of the following MUST be true? (select all that apply) Select...

For a spontaneous process, which of the following MUST be true? (select all that apply) Select all that apply: TΔS>ΔH ΔG>0 ΔSuniv>0 ΔSsys>ΔSsurr

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Answer #1

For reaction to be spontaneous:

ΔG < 0

since

ΔG = ΔH - T*ΔS

So,

ΔH - T*ΔS < 0

T*ΔS > ΔH

For reaction to be spontaneous:

ΔS univ > 0

Since

ΔS univ = ΔS sys + ΔS surr

So,

ΔS sys + ΔS surr > 0

ΔS sys > -ΔS surr

Answer:

TΔS > ΔH

ΔS univ > 0

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