Chemistry
Energy and Reaction Behavior flashcards
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- What is an exothermic reaction?Endothermic and Exothermic Changes
- One transferring energy to surroundings overall.
- What is an endothermic process?Endothermic and Exothermic Changes
- One absorbing energy from surroundings overall.
- What is activation energy?Endothermic and Exothermic Changes
- The pathway barrier to reaction.
- What does a catalyst change?Endothermic and Exothermic Changes
- Pathway barrier and often rate, not net endpoint energy difference.
- What sign is ΔH for an endothermic system?Endothermic and Exothermic Changes
- Positive under the stated constant-pressure convention.
- What does a simple calorimeter measure?Endothermic and Exothermic Changes
- Temperature change used to estimate heat transfer.
- Why must the system be identified?Endothermic and Exothermic Changes
- It determines the sign and boundary of energy transfer.
- How are rate laws obtained?Reaction Rates
- From experimental evidence.
- What is activation energy?Reaction Rates
- The energy barrier associated with a reaction pathway.
- How does a catalyst affect a pathway?Reaction Rates
- It provides an alternative with a lower activation barrier.
- What is dynamic equilibrium?Equilibrium Foundations
- Equal forward and reverse rates with continuing reactions.
- What is Q?Equilibrium Foundations
- A ratio describing the current reaction composition.
- What does Q>K predict?Equilibrium Foundations
- Net reverse change toward equilibrium.