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CHEMISTRY, M2 EQ-Bank 8 MC

  represents which gas law?

  1. Boyle’s Law
  2. Charles’ Law
  3. Avogadro’s Law
  4. Gay-Lussac’s Law
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\(B\)

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  • The equation  represents Charles’ Law, which states that the volume of a gas is directly proportional to its temperature, provided the pressure and amount of gas remain constant.

\(\Rightarrow B\)

CHEMISTRY, M2 EQ-Bank 7

A sample of oxygen gas has a volume of 35 mL. If the temperature of the gas is raised from 40.0°C to 90.0°C, find the new volume of the gas, assuming constant pressure.   (2 marks)

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\(40.6\ \text{mL}\)

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  • Using Charles’s Law:
  •    \(V_1=35\ \text{mL}\), \(T_1=313\ \text{K}\), \(T_2=363\ \text{K}\)
  •   \(\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}\)
  •   \(V_2=\dfrac{V_1 \times T_2}{T_1}=\dfrac{35 \times 363}{313}=40.6\ \text{mL}\)