Isochoric Process- Constant Volume

  • Calculate total work done in a Constant Volume thermodynamic process.

Isochoric Process- Constant Volume

A constant volume process is the vertical path dV = 0 in the P-V plane - up if heat is added and down if heat is removed. Because dV = 0, the work done is \[dW = - P dV = 0\] The First Law of Thermodynamics then states: \[dU= dQ + dW = dQ + 0 = dQ\] \[dQ = dU = mC_V(T_2 - T_1)\]

Solved Example:

72-2-01

Isochoric process is one in which:

Solution:
In isochoric process, volume remains constant. Hence, there is no mechanical work done by the system.

Correct Answer: C

Solved Example:

72-2-02

If a gas is heated against a pressure, keeping the volume constant, then work done will be equal to:

Solution:
As long as the volume remains constant, there is no work done.

Correct Answer: C