
Chemistry Flashcard
Flashcard
•
Science
•
11th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What term describes the heat content of a system?
Back
Enthalpy
2.
FLASHCARD QUESTION
Front
Calculate the volume of 2.35 mole He at 423 K and 1.00 atm if it occupies 57.9 L at 300 K and 1.00 atm.
Back
81.6 L
3.
FLASHCARD QUESTION
Front
What is the order of the reaction given the rate law: rate = k [IO₃⁻][I⁻]?
Back
2
4.
FLASHCARD QUESTION
Front
What is the wavelength of light associated with the electron transition frequency of 2.913 x 10^15 Hz in the hydrogen spectrum?
Back
103 nm
5.
FLASHCARD QUESTION
Front
What is the equilibrium constant (K_eq) for the decomposition of phosphorus pentachloride (PCl₅) to phosphorus trichloride (PCl₃) and chlorine gas (Cl₂) if the initial concentration of PCl₅ is 1.10 mol/L and the equilibrium concentration is 0.33 mol/L?
Back
K_eq = 0.33 / (1.10 - 0.33)² = 0.33 / 0.5776 = 0.572.
6.
FLASHCARD QUESTION
Front
Define entropy in the context of thermodynamics.
Back
Entropy is a measure of the disorder or randomness in a system.
7.
FLASHCARD QUESTION
Front
What is Gibbs free energy and its significance in chemical reactions?
Back
Gibbs free energy (G) indicates the spontaneity of a reaction; a negative change in G means the reaction is spontaneous.
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