Multiple Choice
In the context of gas stoichiometry, which variable is held constant in Charles's Law?
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7. Gases
Gas Stoichiometry
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Which variables are directly related in Gay-Lussac's law for gases?
A
Volume and temperature
B
Volume and amount of gas
C
Pressure and temperature
D
Pressure and volume
Verified step by step guidance1
Recall that Gay-Lussac's law describes the relationship between pressure and temperature of a gas when volume and amount of gas are held constant.
Understand that in Gay-Lussac's law, pressure (P) is directly proportional to temperature (T) when volume (V) and number of moles (n) are constant.
Express this relationship mathematically as \(P \propto T\) or \(\frac{P_1}{T_1} = \frac{P_2}{T_2}\), where pressure and temperature must be in absolute units (Kelvin).
Recognize that volume and amount of gas are not variables directly related in Gay-Lussac's law; those relate to other gas laws like Boyle's or Avogadro's law.
Therefore, the correct variables directly related in Gay-Lussac's law are pressure and temperature.
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