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In which case change in entropy is negative?
Option 1)
Evapouration of water
Option 2)
Expansion of a gas at constant temperature
Option 3)
Sublimation of solid to gas
Option 4)
$2H_{(g)} \rightarrow H_2_{(g)}$

Answers (1)

P Plabita

Gibb's free energy (? G) -

$\Delta G= \Delta H-T \Delta S$

- wherein

$\Delta G=$ Gibb's free energy

$\Delta H=$ enthalpy of reaction

$\Delta S=$ entropy

$T=$ temperature

$2H_{(g)} \rightarrow H_2_{(g)}$

degree of randomness decreases

$\therefore$ entropy decreases and is negative.

Option 1)

Evapouration of water

Option 2)

Expansion of a gas at constant temperature

Option 3)

Sublimation of solid to gas

Option 4)
$2H_{(g)} \rightarrow H_2_{(g)}$

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