If the mean square velocity of gas molecules is doubled, then the pressure of the gas will be:
Correct answer: B. Four times
- A. Double
- B. Four times
- C. Half
- D. Remains the same
Explanation
According to the kinetic theory of gases, pressure is directly proportional to the mean square velocity of gas molecules. If the mean square velocity is doubled, the pressure increases by a factor of four.
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About Molar Specific Heat of a Gas
Molar specific heat is the heat required to raise the temperature of one mole of a gas by one kelvin, expressed through Q = nCΔT. Questions compare the constant volume value Cv with the constant pressure value Cp, apply the ideal gas relation Cp − Cv = R, and identify how the thermodynamic process affects heat capacity.
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