Question 856: Thermodynamics & KTG

Question

Which one of the following statements is wrong for an isobaric process?

Accepted Answer

An isobaric process is one in which the pressure remains constant as the system undergoes a change. Let's analyze the given options:
Option A: The pressure of the system remains constant
This statement is correct because, by definition, an isobaric process maintains a constant pressure.
Option B: There is change in volume, when work is done
This statement is also correct. In an isobaric process, the work done by the gas is the product of the pressure and the change in volume. This can be represented as:
$$W = P \Delta V$$
Option C: Temperature of the system remains constant
This statement is incorrect. In an isothermal process, the temperature remains constant, but in an isobaric process, it is not necessarily the case. The temperature can change even though the pressure remains constant. Therefore, this option is wrong for an isobaric process.
Option D: Energy exchanged is used to do work to change internal energy
This statement is correct. According to the first law of thermodynamics, the energy exchanged (heat energy) in an isobaric process is used to do work and change the internal energy of the system. The energy balance can be expressed as:
$$Q = \Delta U + W$$
where $ Q $ is the heat added to the system, $ \Delta U $ is the change in internal energy, and $ W $ is the work done by the system.
In summary, Option C is the wrong statement for an isobaric process.

Answer

The pressure of the system remains constant

Answer

There is change in volume, when work is done

Answer

Temperature of the system remains constant

Answer

Energy exchanged is used to do work to change internal energy

Thermodynamics & KTG

Which one of the following statements is wrong for an isobaric process?

Choose the correct answer: