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ΔH°

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AP Chemistry

Definition

ΔH°, or standard enthalpy change, is the amount of heat absorbed or released in a reaction at constant pressure and standard conditions (1 atm pressure and 298.15 K).

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"ΔH°" also found in:

Subjects (1)

Biophysics

Practice Questions (5)

Consider the equation 2 SO₃ (g) ⇌ O₂ (g) + 2SO₂ (g). The ΔH° is -198 kJ/mol. Which of the following would cause the reverse reaction to speed up?
Consider the equation PCL₃ (g) + Cl₂ (g) ⇌ PCl₅ (g). The ΔH° is -92.5 kJ/mol. Which of the following would cause an increase in PCl₅?
Consider the equation N₂ (g)+ 3H₂ (g) ⇌ 2NH₃ (g). The ΔH° is -92.6 kJ/mol. Which of the following statements about concentration after the adjusted equilibrium is NOT true?
If the chemical reaction has a positive ΔH°, what change in temperature produces extra reactants?
Which of the following best helps to explain why the value of ΔH° for the dissolving of CaF2 in water is positive?

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ΔH°

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AP Chemistry

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ΔH°

from class:

AP Chemistry

Definition

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"ΔH°" also found in:

Subjects (1)

Practice Questions (5)

© 2024 Fiveable Inc. All rights reserved.

AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.

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