Consider the following statements:}
A. Zeroth law of thermodynamics gives concept of temperature}
B. First law of thermodynamics gives concept of internal energy}
C. In isothermal expansion of ideal gas, $\Delta Q \neq \Delta W$}
D. Product of intensive and extensive variables is extensive}
E. The ratio of any extensive variable to mass will be an extensive variable}
Choose the correct combination of statements from the options given below:
A. Zeroth law of thermodynamics gives concept of temperature}
B. First law of thermodynamics gives concept of internal energy}
C. In isothermal expansion of ideal gas, $\Delta Q \neq \Delta W$}
D. Product of intensive and extensive variables is extensive}
E. The ratio of any extensive variable to mass will be an extensive variable}
Choose the correct combination of statements from the options given below:
- C, D and E Only
- A, B and C Only
- A, B and D Only
- B, C and D Only
The Correct Option is C
Solution and Explanation
This question tests basic definitions and concepts of thermodynamic laws and properties (intensive vs extensive).
Step 2: Detailed Explanation:
Statement A: True. Zeroth law defines thermal equilibrium, which allows the definition of temperature.
Statement B: True. The First law ($\Delta Q = \Delta U + \Delta W$) introduces internal energy as a state function.
Statement C: False. For an ideal gas in an isothermal process, $\Delta T = 0 \implies \Delta U = 0$. Therefore, $\Delta Q = \Delta W$.
Statement D: True. For example, pressure $P$ (intensive) $\times$ volume $V$ (extensive) = Energy (extensive).
Statement E: False. The ratio of two extensive properties is always an intensive property. Specific volume (Volume/Mass) and density (Mass/Volume) are intensive.
Therefore, the correct statements are A, B, and D.
Step 3: Final Answer:
The correct combination is A, B and D Only.
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