For a spontaneous process at all conditions of temperature which of the following is true?

For a spontaneous process at all conditions of temperature which of the following is true?

A
$Δ S positive and Δ H positive$
B
$Δ S positive and Δ H negative$
C
$Δ S negative and Δ H positive$
D
$Δ S negative and Δ H negative$

Solution:

For a spontaneous process $Δ G$ is negative. Since $Δ G = Δ H - T Δ S$

$Δ G$ will always be negative if and only if $Δ H$ is negative and $ΔS$ is positive

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