AP EAMCET · Chemistry · Thermodynamics (C)
If \(\Delta_r \mathrm{H}^{\ominus}\) and \(\Delta_r \mathrm{~S}^{\ominus}\) are standard enthalpy change and standard entropy change respectively for a reaction, the incorrect option is
- A \(\Delta_r \mathrm{H}^{\ominus}=\) negative; \(\Delta_r \mathrm{~S}^{\ominus}=\) positive; spontaneous at all temperatures
- B \(\Delta_r \mathrm{H}^{\ominus}=\) negative; \(\Delta_r \mathrm{~S}^{\ominus}=\) negative; non-spontaneous at low temperatures
- C \(\Delta_r \mathrm{H}^{\ominus}=\) positive; \(\Delta_r \mathrm{~S}^{\ominus}=\) positive; non-spontaneous at low temperatures
- D \(\Delta_r \mathrm{H}^{\ominus}=\) negative; \(\Delta_r \mathrm{~S}^{\ominus}=\) negative; spontaneous at low temperatures
Answer & Solution
Correct Answer
(B) \(\Delta_r \mathrm{H}^{\ominus}=\) negative; \(\Delta_r \mathrm{~S}^{\ominus}=\) negative; non-spontaneous at low temperatures
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