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Relation between pressure (P) and energy (E) of a gas is

1. P = 2E/3
2. P = E/3
3. P = E
4. P = 3E

Correct answer: P = 2E/3

Solution

For an ideal gas, the pressure is related to the kinetic energy of the gas molecules. Using the kinetic theory of gases, the relation is derived as P = (2/3)E, where E is the total kinetic energy per unit volume.

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