ch 19 chem
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What is delta H?
The change in the heat of something (reaction, phase change) at constant pressure
When do delta H and delta E differ substantially?
When a gas is formed or consumed in reaction/phase change
Entropy is what?
Entropy describes the number of equivalent ways that energy can be distributed in a system. Describes the randomness of a system
What is the standard heat of formation?
is the amount of heat absorbed or evolved when specifically one mole of the substance is formed at and 1 atm from its elements in their standard states
What happens to position of equilibrium of reaction if ∆G◦ is positive?
Position of equilibrium lies closer to reactants and reaction appears non-spontaneous
What happens to position of equilibrium of reaction if ∆G◦ is negative?
Position of equilibrium lies close to products and reaction appears spontaneous.
What happns to position of equilibrium if ∆G◦ is equal to zero?
Position of equilibrium lies halfway between products and reactants. Significant amount of both products and reactants
At equilibrium, a reaction has how much free energy?
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