Question

Isochor is the graph plotted between

• A. temperature on X-axis and volume on Y-axis at constant pressure
• B. temperature on X-axis and pressure on Y-axis at constant volume
• C. pressure on X-axis and volume on Y-axis at constant temperature
• D. reciprocal of volume on X-axis and pressure on Y-axis at constant temperature

Hint:

Isochoric process: volume constant, pressure proportional to temperature.

Answer 1

The Correct Option is B

Step 1: Define isochoric process.
An isochoric process is a thermodynamic process in which the volume of the gas remains constant throughout the change.
Step 2: Apply the gas law.
At constant volume, pressure is directly proportional to temperature according to Gay-Lussac’s law:
\[ P \propto T \quad (\text{at constant } V) \]
Step 3: Analyze the options.
(A) This represents Charles’ law at constant pressure.
(B) This correctly represents an isochoric process, where pressure varies with temperature at constant volume.
(C) This represents Boyle’s law at constant temperature.
(D) This also relates to Boyle’s law.
Step 4: Conclusion.
An isochor is plotted between temperature and pressure at constant volume.