Question

The second law of thermodynamics states that 'whenever a spontaneous process takes place, it is accompanied by an increase in the total energy of the universe.' The equation that satisfies the above law is:

• A. $\Delta S_{\text{universe}} = S_{\text{system}} - \Delta S_{\text{surroundings}}$
• B. $\Delta S_{\text{universe}} = S_{\text{surroundings}} - \Delta S_{\text{system}}$
• C. $S_{\text{system}} = \Delta S_{\text{universe}} + \Delta S_{\text{surroundings}}$
• D. $\Delta S_{\text{universe}} = S_{\text{system}} + \Delta S_{\text{surroundings}}$

Answer 1

Answer: (D)

$\Delta S_{\text{universe}} = S_{\text{system}} + \Delta S_{\text{surroundings}}$

Answer 2

The correct option is (D): $\Delta S_{\text{universe}} = S_{\text{system}} + \Delta S_{\text{surroundings}}$