OBJECTIVE LIFE SCIENCE
BIOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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positive, positive
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positive, negative
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negative, positive
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negative, negative
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none of the above
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Detailed explanation-1: -Answer and Explanation: The spontaneity of the reaction is predicted by the sign of G, If it is negative then the reaction is spontaneous and if it is positive then it will non-spontaneous. The reaction to never be spontaneous the sign of H must be positive and that of S must be negative for all temperatures.
Detailed explanation-2: -If H is positive and S is negative, G will never be negative and a reaction will not be spontaneous at any temperature, or you could say that the reverse reaction is spontaneous at all temperatures.
Detailed explanation-3: -When H is positive and S is negative, the sign of G will always be positive, and the reaction can never be spontaneous. This corresponds to both driving forces working against product formation.
Detailed explanation-4: -If H is negative and S is positive, the reaction is spontaneous at all temperatures because the change in Gibbs free energy is always negative. Contrastingly, if H is positive and S is negative, the reaction is nonspontaneous at all temperatures as written.