First slide

Gaseous state

Question

At 25°C and 730 torr pressure, 730 cm³ of dry oxygen was collected. If the temperature is kept constant, calculate volume in (dm³) that oxygen will occupy at 760 torr pressure

Moderate

Solution

$P_{1} = 730 mm \begin{array}{l} V_{1} = 730 mL \\ V_{2} = ? \\ P_{2} = 760 mm \\ ∴ P_{1} V_{1} = P_{2} {\overset{}{V}}_{2} \\ V_{2} = \frac{P_{1} V_{1}}{P_{2}} = \frac{730 \times 730}{760} = 701 mL \\ = 0.70 L \end{array}$ 1mm=1torr , 1dm³=1 litre

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