Question

In an isobaric expansion of a gas:
1. Volume and temperature both increases
2. Volume increases and temperature decreases
3. Volume decreases and temperature increases
4. Volume and temperature both decreases

Answer 1

Correct Answer - Option 1 : Volume and temperature both increases

CONCEPT:

Isobaric process:

• When a thermodynamic process undergoes a physical change in such a way that its pressure remains constant, then the change is known as the isobaric process.

⇒ P = constant

EXPLANATION:

• In an isobaric process,

⇒ P = constant     -----(1)

• The ideal gas equation is given as,

⇒ PV = nRT       -----(2)

Where P = pressure, V = volume, T = temperature, n = number of moles, and R = gas constant

By equation 1 and equation 2 for an isobaric process,

⇒ V ∝ T      -----(3)

• By equation 3 we can say for an isobaric process the volume of the gas is directly proportional to the temperature.
• In an expansion process the volume of the gas increases, so the temperature also increases. Hence, option 1 is correct.