KCET · Chemistry · Thermodynamics (C)
Considering the reaction \(\mathrm{C}(s)+\mathrm{O}_{2}(g)\) \(\longrightarrow \mathrm{CO}_{2}(g)+393.5 \mathrm{~kJ}\) the signs of \(\Delta H, \Delta S\) and \(\Delta G\) respectively are
- A \(+,-,-\)
- B \(-,+,+\)
- C \(-,-,-\)
- D \(-,+,-\)
Answer & Solution
Correct Answer
(C) \(-,-,-\)
Step-by-step Solution
Detailed explanation
\(\Delta H=-\) ve (combustion reaction)
\(\Delta S=-\) ve (spontaneous at all temperature)
\(\Delta G=-\) ve (because reaction is spontaneous)
\(\Delta S=-\) ve (spontaneous at all temperature)
\(\Delta G=-\) ve (because reaction is spontaneous)
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