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JAMB Physics 2021 Paper

Question : 28

Total: 40

_{0}

_{0}

Solution:

Concept:

At constant temperature, the pressure of a gas is inversely proportional to its volume, according to Boyle's law.

Explanation:

Initial conditions:

P_1 = p_0

and

V_1 = V_0

The gas is compressed to one-fifth of its volume, so

V_2 = \frac{V_0}{5}

Since temperature stays constant, use

P_1 V_1 = P_2 V_2

Substitute the values:

p_0 V_0 = P_2 \times \frac{V_0}{5}

Cancel

V_0

p_0 = \frac{P_2}{5}

Multiply both sides by 5:

P_2 = 5p_0

Answer:

5p_0

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