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Chapter 53: Problem 1

a) What values of \(\Delta H^{\circ}\) indicate that a reaction is energetically favorable? b) What values of \(\Delta S^{\circ}\) indicate that a reaction is entropically favorable?

Short Answer

Expert verified
a) \(\Delta H^{\circ}<0\) indicates an energetically favorable reaction. b) \(\Delta S^{\circ}>0\) indicates an entropically favorable reaction.

Step by step solution

01

Understanding Enthalpy

Enthalpy (\(\Delta H^{\circ}\)) is a measure of heat energy in a system. A negative \(\Delta H^{\circ}\) indicates an exothermic reaction, where energy is released. Because systems tend to go towards lower energy levels, a negative \(\Delta H^{\circ}\) would mean an energetically favorable reaction.
02

Understanding Entropy

Entropy (\(\Delta S^{\circ}\)) is a measure of randomness or disorder in a system. An increase in entropy (positive \(\Delta S^{\circ}\)) shows a move towards greater disorder, which is a natural tendency for a system. Thus, a positive \(\Delta S^{\circ}\) indicates an entropically favorable reaction.

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Most popular questions from this chapter

If \(\Delta H^{\circ}=T \Delta S^{\circ}\), what is the value of \(\Delta G^{\circ}\) ? Predict the value of \(K\) in this case.

Eor a chemical reaction with \(K>1\), is \(\Delta G^{\circ}\) positive or negative?

For a chemical reaction with \(K<1\), is \(\Delta G^{\circ}\) positive or negative?
See all solutions

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