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JAMB Physics 2017 Paper

Question : 46

Total: 49

Solution:

Concept:

At constant temperature, Boyle’s law states that pressure and volume of a fixed mass of gas are inversely proportional:

P_1V_1 = P_2V_2

Explanation:

Given initial pressure

P_1 = 400\, \text{cmHg}

and initial volume

V_1 = 10\, \text{cm}^3

New pressure is

P_2 = 200\, \text{cmHg}

Using Boyle’s law:

V_2 = \frac{P_1 V_1}{P_2}

Substitute the values:

V_2 = \frac{400 \times 10}{200}

V_2 = \frac{4000}{200} = 20\, \text{cm}^3

Answer:

The new volume is

20\, \text{cm}^3

, which corresponds to option D.

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