Moderate

Starting with the same initial conditions, an ideal gas expands from volume V1 to V2 in three different ways. The work done by the gas is W1, if the process is purely isothermal. W2 if purely isobaric and W3 if purely adiabatic then:

Correct answer: A. W2 > W1 > W3

  • A. W2 > W1 > W3
  • B. W1 > W2 > W3
  • C. W2 > W3 > W1
  • D. W1 > W3 > W2

Explanation

Wisobaric > Wisothermal > Wadiabatic Isothermal Process: In an isothermal process, the expansion of the gas occurs at a constant temperature. This means that the gas absorbs heat from its surroundings as it expands, and this heat absorption compensates for the decrease in internal energy of the gas.Isobaric Process: In an isobaric process, the expansion of the gas occurs at a constant pressure. This means that the gas is allowed to exchange heat with its surroundings to maintain a constant pressure during the expansion. Adiabatic Process: In an adiabatic process, the expansion of the gas occurs without any heat exchange with its surroundings. This means that there is no heat flow into or out of the gas during the expansion.

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About Work

Work is done when a force produces displacement, with its value determined by the component of force along the displacement. The topic covers positive, negative and zero work, work by variable forces from force-displacement graphs, and the connection between net work and change in kinetic energy.

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