Question

Identify correct statements (1) Zeroth law of thermodynamics gives concept of temperature. (2) In isothermal expansion \(\Delta Q \neq \Delta W\). (3) First law of thermodynamics gives concept of internal energy. (4) Product of intensive and extensive properties is extensive. (5) Ratio of extensive property and mass is extensive.

• A. Statements \(1\) and \(4\)
• B. Statements \(1,3,4\)
• C. Statements \(3,4,5\)
• D. Statements \(1,2,3\)

Answer 1

The Correct Option is A

Step 1: Statement (1) Zeroth law defines thermal equilibrium and introduces the concept of temperature. \[ \text{True} \] Step 2: Statement (2) For isothermal process of an ideal gas: \[ \Delta U = 0 \] Thus \[ Q = W \] Hence \(\Delta Q \neq \Delta W\) is false. \[ \text{False} \] Step 3: Statement (3) First law states \[ \Delta Q = \Delta U + W \] It relates heat and work but does not introduce the concept of internal energy. \[ \text{False} \] Step 4: Statement (4) Product of intensive and extensive property is extensive. Example: \[ (\text{pressure}) \times (\text{volume}) = \text{energy} \] \[ \text{True} \] Step 5: Statement (5) Ratio of extensive property and mass becomes intensive. Thus statement is false. \[ \text{False} \] Correct statements are \(1\) and \(4\). \[ \boxed{\text{Option (1)}} \]