Engineering Board Exam Reviewer · Thermodynamics · easy

A perpetual motion machine of the second kind (PMM2) violates the:

1. First law of thermodynamics
2. Second law of thermodynamics
3. Zeroth law of thermodynamics
4. Law of conservation of mass

Answer

B. Second law of thermodynamics

Solution

A PMM2 would convert heat from a single reservoir completely into work (violating the Kelvin–Planck statement).

More Thermodynamics questions

1. The Clausius statement of the second law says that:
2. The Kelvin–Planck statement of the second law says it is impossible for a device operating in a cycle to:
3. The law stating that the total pressure of a gas mixture equals the sum of the partial pressures of its components is:
4. The value of the universal gas constant R is approximately:
5. Gay-Lussac's law states that for a fixed mass of gas at constant volume:
6. Boyle's law states that for a fixed mass of gas at constant temperature:
7. For an ideal gas, the difference between cp and cv is equal to:
8. The ratio of specific heats k = cp/cv for air at room temperature is approximately:
9. The amount of heat required to raise the temperature of a unit mass of a substance by one degree is called:
10. The heat required to change the phase of a substance without a change in temperature is called:

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