CAIE IGCSE Physics 2.1.3.3 Recall Use Pv Constant for a Fixed Questions

Practise applying Boyle’s law pV = constant to fixed masses of gas at constant temperature with CAIE IGCSE Physics questions and mark schemes.

Exam points

Apply Boyle’s law pV = constant to fixed masses of gas at constant temperature.

[Maximum number: 3]

A gas cylinder contains helium gas at a pressure of $2.0 \times 10^{6} \mathrm{~Pa}$ . A volume of $0.026 \mathrm{~m}^{3}$ of the compressed gas is released from the cylinder into balloons. Each balloon contains $0.015 \mathrm{~m}^{3}$ of helium at atmospheric pressure ( $1.0 \times 10^{5} \mathrm{~Pa}$ ). The temperature remains constant.

Calculate the maximum number of balloons that can be filled.

(maximum number = ) 34
p V= constant OR $\left\{2.0 \times 10^{6} \times 0.026\right\}=1.0 \times 10^{5} \times V_{2}$ $V_{2}=0.52\left(\mathrm{~m}^{3}\right) \mathbf{OR}\left(V_{2}=\right)\left\{2.0 \times 10^{6} \times 0.026\right\} / 1.0 \times 10^{5}$

OR (number of balloons = ) $\left\{2.0 \times 10^{6} \times 0.026\right\} /\left\{1.0 \times 10^{5} \times 0.015\right\}$

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CAIE IGCSE Physics 2.1.3.3 Recall Use Pv Constant for a Fixed Questions question 1