MHT CET2007PhysicsMechanical Properties of Fluids
We consider a thermodynamic system. If U represents the increase in its internal energy and W the work done by the system, which of the following statements is true?
Options
- AU=-W is an adiabatic process
- BU=W in an isothermal process
- CU=-W in an isothermal process
- DU=W in an adiabatic process
Correct answer
A. U=-W is an adiabatic process
Step-by-step solution
An isothermal process is a constant temperature process. In this process, T= constant or T=0 . U=n C_ V T=0 An adiabatic process is defined as one with no heat transfer into or out of a system. Therefore, Q=0 . From the first law of thermodynamics. W=- U or U=-W