When two bodies are in thermal equilibrium with a third body, they are also in t

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When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called
Options
A. Zeroth law of thermodynamics
B. First law of thermodynamics
C. Second law of thermodynamics
D. Kelvin Planck's law

Correct Answer

Zeroth law of thermodynamics

Thermodynamics problems

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2. The general gas energy equation is (where Q_{1 - 2} = Heat supplied, dU = Change in internal energy, and W_{1 - 2} = Work done in heat units)
Options
A. Q_{1 - 2} = dU + W_{1 - 2}
B. Q_{1 - 2} = dU - W_{1 - 2}
C. Q_{1 - 2} = dU/W_{1 - 2}
D. Q_{1 - 2} = dU x W_{1 - 2}

5. For a perfect gas, according to Boyle's law (where p = Absolute pressure, v = Volume, and T = Absolute temperature)
Options
A. p v = constant, if T is kept constant
B. v/T = constant, if p is kept constant
C. p/T = constant, if v is kept constant
D. T/p = constant, if v is kept constant

9. Which of the following is the correct statement of the second law of thermodynamics?
Options
A. It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work.
B. It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source.
C. There is a definite amount of mechanical energy, which can be obtained from a given quantity of heat energy.
D. all of the above

10. During which of the following process does heat rejection takes place in Carnot cycle?
Options
A. Isothermal expansion
B. Isentropic expansion
C. Isothermal compression
D. Isentropic compression

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