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What happens when ΔH and ΔS are both negative?

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Final answer:

When ΔH and ΔS are both negative, it means that the reaction is exothermic and decreases in disorder.

Step-by-step explanation:

When both ΔH (enthalpy change) and ΔS (entropy change) are negative, it means that the reaction is both exothermic and decreasing in disorder. A negative ΔH indicates that energy is being released in the reaction, while a negative ΔS indicates that the system is moving towards a more ordered state.

For example, when water freezes into ice, it undergoes a decrease in enthalpy and entropy. The process releases heat (ΔH < 0) and the particles become more organized and less random (ΔS < 0).

In summary, when ΔH and ΔS are both negative, it implies that the reaction releases energy and leads to a decrease in disorder.

Learn more about exothermic reactions

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